Why is hydrogen placed in group 1 and not in group 17. Ans : Hydrogen, c...
Why is hydrogen placed in group 1 and not in group 17. Ans : Hydrogen, commonly known as protium, is the first element in the periodic chart. 0:00 Intro1:13 Introduction 07:12 Why Hydrogen is pla Jul 3, 2023 · It is not justified to include hydrogen either along with alkali metal of group 1 or halogens of group 17. There are altogether five different types of arguments that lead to the fol-lowing conclusions: (1) Hydrogen should be placed in Group 1 Oct 29, 2021 · Thus, no fixed position was given to hydrogen in Mendeleev’s periodic table. In the periodic table, hydrogen can be placed in groups 1. Due to the presence of only one electron, hydrogen, like alkali metals and halogens, has a dual behaviour. 1]. It is a nonmetal under ordinary conditions, but it's located above the alkali metals because it has one electron in its outer shell like them. However, in group 1, hydrogen shares properties with the alkaline metals. Hydrogen is placed along with the alkali metals group as it has the similar outer electron configuration as that of the group 1 elements (i. Hydrogen resembles the elements of group I-A, IV-A and VII-A in some respects. Hydrogen is placed separately from other elements in the periodic table because it has unique properties that don't fit neatly into any one group. Nov 2, 2023 · Step 1: Understanding the electronic configuration of hydrogen The electronic configuration of hydrogen is 1s^1. This versatility allows hydrogen to behave like both alkali metals and halogens, depending on the context of its reactions. Understanding Hydrogen's Position Hydrogen is placed in two different positions on the periodic table: Group 1 and Group 17. As a result, it appears that hydrogen should be placed in both group 1 and group 17 at the same time. The First Group Sodium (Na) is an element in group 1 of the periodic table of the elements. However, since it does not behave as a metal, it is often placed separately at the top of the Periodic Table. Indeed, some versions of the periodic table place hydrogen above fluorine in group 17 because the addition of a single electron to a hydrogen atom completes its valence shell. In most Periodic Tables hydrogen is placed at the top of Group 1 (or IA), but in some it is placed at the top of Group 17 (or VIIA). This is the main reason why hydrogen can be placed in two different groups of the periodic table. -Lanthanides and actinides cannot be placed in the periodic table due to their similar chemical properties. Sep 1, 2024 · Hydrogen in Periodic table Hydrogen element is in group 1 and period 1 of the Periodic table. Jul 3, 2023 · It is not justified to include hydrogen either along with alkali metal of group 1 or halogens of group 17. Hydrogen's Position in the Periodic Table Hydrogen is a unique element and its placement in the periodic table can be somewhat confusing. Local news, sports, business, politics, entertainment, travel, restaurants and opinion for Seattle and the Pacific Northwest. As hydrogen can Assertion :Hydrogen can be placed in both I A group and VII A group of the modern periodic table. Hydrogen easily donate the electron and forms a stable cation (H+) hence it resembles alkali metals of group. Position of an element in periodic table depends upon its electronic configuration and properties. It … Alkali metals, located in Group 1 (excluding hydrogen), are known for their high reactivity, especially with water, and their soft nature that allows them to be cut with a knife. It is a nonmetal, but its single electron and ability to lose that electron in a reaction gives it some properties similar to alkali metals. The word "alkali" received its name from the Arabic word "al qali Position of an element in periodic table depends upon its electronic configuration and properties. Hydrogen has 1 proton, helium has 2, carbon has 6, gold has 79. Study with Quizlet and memorize flashcards containing terms like The Hydrogen atom consists of a nucleus with ____ Proton(s) surrounded by ____ electron(s), In what ways does hydrogen contrast with the Group 1A(1) elements? Select all that apply. +1 and +2 respectively b. 2. Both placements are due to its unique properties that resemble the elements in these groups. Hydrogen was the first and only element present in the universe after the big bang. When these two groups react, the alkali metal atom donates its one electron to the halogen atom. (2) On the other hand, hydrogen easily donates the electron and forms a stable cation (H+), but it does not easily form a stable anion (H-), hydride ion. However, due to its unique properties, it is sometimes shown separately or associated with Group 17 to reflect its ability to gain an electron. Despite similarities with the alkali metals, such as having a single outer electron, hydrogen is distinct in its reactivity and properties. May 1, 2021 · However, Hydrogen, it is both one electron away from having an empty shell and one electron away from having a full shell. It is important to note that the placement of hydrogen is not universally agreed upon and its position on the periodic table can vary depending on the periodic table being used and the purpose for which it is being used. However, it varies greatly from the alkali metals as it forms cations (H +) more reluctantly than the other alkali metals. It has only one electron in its outermost shell. Give reasons why hydrogen could be placed in either Group 1 or Group 7. Know This : Hydrogen can be placed in group 1 as it has one electron in the outer shell, (1s1). txt apache-user-enum-2. As hydrogen has 1 valence electron, so it either loses one electron and behaves like electropositive alkali metals of group 1 or it gains one electron and behaves like electronegative halogens of group 17. Group I of the periodic table consists of hydrogen and alkali metals. Abstract Several attempts have recently been made to point to ‘the proper place’ for hydrogen (sometimes also helium) in the Periodic Table of the elements. It is a diatomic gas. Let us take a look at the unique position of hydrogen in the periodic table. Additionally, hydrogen shares similarities with the halogens in Group 17, as it can also form negatively charged ions The Periodic Table groups together elements with similar properties. txt I considered that it's just because it has the one valence electron like the alkali metals, and that's just how the groups are ordered, but then again, boron has 3 valence electrons but is still allowed to sit in group 13 because it shares properties with it's neighbors, so why isn't hydrogen given the same treatment with the halogens? The reason why the hydrogen can be placed in both group 1 and group 17 is that it resembles Alkali metals in some of its properties like it can easily form cations so, it can be placed in Group 1 of periodic table but it also resembles Halogens in its properties like it forms H 2 which is true property of halogen that is why it can be placed in group 17 of periodic table. Elements in the same group of the periodic table have the same number of valence electrons. e Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table. txt best110. Hydrogen has the simplest electronic configuration of 1. It also stands at the border of metals and non-metals. It includes the nonmetal hydrogen (H) and six metals that are called alkali metals. There are alto-gether five diferent types of arguments that lead to the following conclusions: (1) hydro-gen should be placed in group 1, above lithium; (2) hydrogen should be placed in group 17, above fluorine; (3) hydrogen is to be The position of hydrogen in the periodic table is unclear because it resembles both the alkali metals and halogens in some of its properties. Oct 21, 2019 · Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. However, hydrogen's distinct properties make it unique in the periodic table. However, it is placed in the first group, above all the alkali metals in the modern periodic table because its electronic configuration is similar to that of alkali metals. so hydrogen is also placed for the same. As per the periodic table, H2 doesn’t have a fixed position, but mainly it places first in the periodic table. Assertion :Hydrogen can be placed in both I A group and VII A group of the modern periodic table. Position of hydrogen in the periodic table is in group one with alkali metals because it has a similarity of valence shell with a family of alkali metals like lithium, sodium, and so on. May 9, 2023 · Hydrogen is not placed in group 17 of the periodic table because it does not have the same properties as the halogens in that group. src folder wordlist apache-user-enum-1. That is why position of hydrogen is still undecided, but because of the study purpose and maintaing regularity It is placed We are all aware of our Modern Periodic table. The alkali metals include: lithium, sodium, potassium, rubidium, cesium, and francium. Of those, 92 Local news, sports, business, politics, entertainment, travel, restaurants and opinion for Seattle and the Pacific Northwest. Hydrogen is larger than the lithium but smaller than the other alkali metals . +3 and +4 respectively d. However, hydrogen is unique and does not fit perfectly into any group. Mar 10, 2020 · Hydrogen is a non metal but as per the electronic configuration there is the arrangement of the electrons and the elements with one electron in the outer most shell is placed in the 1st group. The position of hydrogen in the periodic table is Anomalous. In this blog post, we will dive deep into the intriguing world of hydrogen’s placement and explore the reasons behind Jun 4, 2024 · Hydrogen is included in the periodic table. It was through subsequent fusion of hydrogen when stars formed that heavier elements were made. Hydrogen has a unique position in the periodic table due to its properties that make it fit into both Group 1 (alkali metals) and Group 17 (halogens). Hydrogen is usually placed in Group 1 because it has 1 electron in its outermost shell and commonly forms +1 ions like alkali metals. However, its non-metallic nature and differing chemical properties make these placements inappropriate. Because it is a special case, we shall place hydrogen separately at the top of the Periodic Table Ozone The valency of cuprous and cupric ions are a. Feb 17, 2024 · Hydrogen is not placed in a separate group other than Group 1 because it exhibits similar chemical properties to the elements in Group 1, particularly in its ability to form positively charged ions (H+) like the alkali metals. It tends to lose its electron to form a positive ion and reacts similarly to other Group 1 elements. Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Answer and Explanation: 1 Become a Study. both of these d. Properties of hydrogen do not completely match any one of the above-mentioned groups. Therefore, while discussing the alkali metals of group 1, hydrogen is never included. Since it has only one electron, hydrogen can easily lose, gain, or share an electron, resulting in various possibilities. Hydrogen is placed in the same group as the alkali metals because it has one electron in its outermost shell, similar to alkali metals. There are altogether five different types of arguments that lead to the following conclusions: (1) hydrogen should be placed in group 1, above lithium; (2) hydrogen should be placed in group 17 This page outlines the properties of alkali metals in Group I of the periodic table, including their outer electron configuration with one \\(s\\) orbital electron, resulting in high reactivity. Therefore, it appears that hydrogen should be placed simultaneously in group- 1) as well as in group 17. Hydrogen resembles alkali metals as well as halogens in the following properties, so it is best placed separately in the periodic table. Jan 24, 2023 · Thus, hydrogen resembles alkali metals (elements of group 1) on one hand and as halogens (elements of group 17) on the other. Additionally, hydrogen shares similarities with the halogens in Group 17, as it can also form negatively charged ions Group 1 elements, also known as alkali metals, have one electron in their outermost energy level, while Group 17 elements, known as halogens, have seven electrons in their outermost energy level. [3] Some variation can be found on both these matters. Therefore, hydrogen resembles alkali metals (group 1 elements) as they also contain one electron in their valence shell (alkali metals tend to lose their valence electron). However, like group 17 elements, it requires only electron to complete its valence shell, thus it can also gain an electron to achieve a noble gas configuration. Occasionally, hydrogen is shown sitting at the top of Group 17. Since hydrogen atoms are very small in size, many properties of hydrogen are different from those of alkali metals. Jun 30, 2023 · Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns 1 electron configuration like the alkali metals. Ultimately, hydrogen's distinct behavior Hydrogen Placement in the Periodic Table Hydrogen's placement in the periodic table can be a topic of debate due to its unique properties. In each case, there is one electron in the outer orbital, an s-orbital electron. ion c. May 23, 2023 · Hydrogen is located by itself above the alkali metals in Group 1 because it has very different properties from the other elements in that group. Hence, it is better placed in group 1 rather than in group 17 in the modern periodic table. There are 118 recognized elements in total. It can also gain an electron to achieve a noble gas arrangement and hence it can behave similar to a group 17 (halogen family) elements. Hydrogen’s small atomic size, high ionization energy, nonmetallic nature, and lone valence electron cause it to behave differently than the Group 1 metals. Oct 26, 2021 · The other exception is hydrogen. Although hydrogen has an ns 1 electron configuration, its chemistry does not resemble that of the Group 1 metals. none of these Which non-metal exhibits variable valencies of 2, 4 and May 9, 2023 · Key Takeaways: Why is Hydrogen in Group 1? Hydrogen is placed in Group 1 of the periodic table due to its one electron in the outer shell and similar properties to the alkali metals. This is because addition of one electron to hydrogen gives a Group 18 element configuration, just as it des for the halogens. Jul 23, 2025 · As a result, hydrogen resembles alkali metals (group 1) on the one hand and halogens (group 17) on the other. As a result, the position of hydrogen in the periodic table above the alkali metals in group 11 and beside the halogens in group 17. Indeed, some versions of the periodic table place hydrogen above fluorine in Group 17 because the addition of a single electron to a hydrogen atom completes its valence shell. Hydrogen has electronic configuration of 1s1. It has only one s-electron and hence can be placed in group 1 (alkali metals). Hydrogen forms covalent bonds with nonmetals. Hydrogen can be placed in group 17 (ns2np5) (halogens) as it can get one electron to get outer electronic configuration of inert gas. txt best1050. Hydrogen has one electron in its outer shell, as do the other elements in the first column. Here are the correct statements regarding its placement: Hydrogen can be placed in group 1A because it has one electron in its outermost (only) electron shell. Multiple select question. The position of hydrogen is not fixed in the periodic table, sometimes it is placed with alkali metals in 1st group and sometimes with halogens in the 17th group as it resembles with alkali metal metals as well as with halogens. Although often listed in Group 1 due to its electronic configuration, hydrogen is not technically an alkali metal since it rarely exhibits similar behavior. Step 2 Abstract Several attempts have recently been made to point to ‘the proper place’ for hydrogen (sometimes also helium) in the Periodic Table of the elements. Feb 8, 2024 · Why Hydrogen is Placed on Top in Group 1 Hydrogen is uniquely positioned in the periodic table due to its chemical versatility and the singular electron configuration in its 1s orbital. Hydrogen has one electron in its outermost shell, similar to the alkali metals in Understanding Hydrogen's Position Hydrogen is placed in two different positions on the periodic table: Group 1 and Group 17. Step 5. And one main point of contention in the previous attempts was the position of hydrogen in the periodic table. Because hydrogen is a nonmetal and forms H- (hydride anions), it is sometimes placed above the halogens in the periodic table. May 19, 2024 · Therefore, hydrogen is sometimes placed in Group 1, sometimes in Group 17, and sometimes in a separate group on its own. Here are five reasons why the first element on the periodic table is placed in both group 1 ang group 7. com member to unlock this answer! Create your account View This page outlines the properties of alkali metals in Group I of the periodic table, including their outer electron configuration with one \\(s\\) orbital electron, resulting in high reactivity. Hydrogen's Placement in the Periodic Table Because hydrogen forms compounds with oxidation numbers of both +1 and -1, many periodic tables include this element in both Group IA (with Li, Na, K, Rb, Cs, and Fr) and Group VIIA (with F, Cl, Br, I, and At). That is why position of hydrogen is still undecided, but because of the study purpose and maintaing regularity It is placed Though it has been placed along with the group 1 elements of the periodic table, hydrogen does not share many of the properties of group 1 elements. Hydrogen: A neutral hydrogen atom has 1 proton and 1 electron. -There is no such position for the isotopes in the periodic table. State the electronic configuration of hydrogen [at. Hydrogen is an important element in the periodic table. Alkali metals are the chemical elements found in Group 1 of the periodic table. 0. +1 and +3 respectively An atom or a group of atoms that can take part in a chemical reaction is called a/an a. It … Find step-by-step Chemistry solutions and the answer to the textbook question Why is hydrogen not considered to be a member of Group 1 (the alkali metals)?. But it took chemists years and many attempts to arrive at our current periodic table. Why does hydrogen belong in the alkali metals/group 1 and not in the halogens/group 17? Nonessential add-on: inspiration for this question for coming across the chemical perfluorohexane, C6F14. We’ll look at how hydrogen compares to the elements in groups 1 and 17, its electronic configuration, and some of hydrogen’s other anomalous traits. Despite its differences, hydrogen is still most similar to the alkali metals and therefore belongs in Group 1. This is a gas at room temperature, for example. Sep 21, 2020 · Hydrogen Placed first in Periodic Tabl e: Periodic Tables are used for various professional purposes. e ns1). The halogens are all nonmetals and have a strong tendency to gain electrons to form negative ions. Oct 10, 2023 · Hydrogen can be placed either in group 1 (like alkali metals) because it can lose an electron to form a cation, or in group 7 (like halogens) because it can gain an electron to achieve a full valence shell or share an electron to form a covalent bond. It is the first element on the table and has an atomic number of 1. Aug 10, 2025 · Hydrogen's ability to both lose and gain one electron allows it to be considered for placement in both Group 1 and Group 17. Indeed, some versions of the periodic table place hydrogen above fluorine in Group 17 because the addition of a single electron to a hydrogen atom completes its valence shell. Hydrogen is not an alkali metal but has some similar properties due to its simple one proton (located in the nucleus) and one electron arrangement. Hydrogen conducts electricity in liquid form just like a metal does. View Solution Q 3 Jun 20, 2024 · A 17-alkyl group refers to an alkyl group (a chain of carbon and hydrogen atoms) that is attached at the 17th position on a molecule, typically in organic chemistry. That proton count, called the atomic number, is what makes each element unique. Oct 31, 2023 · Have you ever wondered why hydrogen, the very first element on the periodic table, is placed in Group 1, alongside metals like lithium and sodium, rather than in Group 17 with the halogens? It’s a question that has puzzled scientists and chemistry enthusiasts for decades. radical b. There are many reasons that hydrogen is placed first in the periodic table. This is true. I could see a couple of reasons why hydrogen belongs in Group 1: - Hydrogen's electron configuration is a 1s 1 whereas every halogen has an electron configuration of s 2 p 5, meaning that hydrogen is structurally different from every halogen. No chemical or physical process can break an element down into something simpler. May 31, 2024 · The alkali metals are the metals in Group 1 (the first column of the periodic table). View Solution Q 3 India’s Smash Hit Beats Ready or Not 2 at Box Office, Ends up at #3 A Hollywood horror follow-up and a large-scale Bollywood sequel are going head-to-head at the box office, with early numbers revealing… Dec 27, 2021 · Hydrogen contains one valence electron in its valence shell and thus, its valency is one. Hydrogen placed in group 1 Group 1 belongs to the alkali metals, which behave as strong See full answer below. There are some limitations of modern periodic table , which are, -The position of the hydrogen is still in confusion as it has similarities with group 1 and group 17 elements. Halogens, found in Group 17, are highly reactive nonmetals that readily form salts when reacting with metals. Oct 6, 2023 · Hydrogen is an element that is difficult to fit into a suitable position in the Periodic Table. It has an [1s1] electrical arrangement. +2 and +3 respectively c. Thus hydrogen shows similarity in 2. It can accept the electron from metals to fulfill its' outer orbital like group 17 elements. Hydrogen is also in Group 1, and so is technically considered to be part of the alkali metal group/family. Reason: Similarity in properties with both IA and VII A group. It is placed in Group 1 and Period 1 of the periodic table. Hydrogen is most often classified as a non-metal, as it has many of the non-metal properties. In fact, the chemistry of hydrogen does not greatly resemble that of the metals of group 1. This group (column) of the table is shown in Figure below. On the other hand, it can donate its' electron to form H + ion which is the characteristics of the group 1 elements. May 23, 2023 · In this article, we’ll examine why hydrogen appears detached from the rest of the periodic table. Feb 21, 2018 · Hydrogen can be placed in either Group 1 or Group 17 of the periodic table due to its unique characteristics, including having one valence electron, the ability to lose or gain that electron, and forming both cations and anions. This causes hydrogen and other elements in the first column to behave similarly in certain ways, such as forming similar chemical bonds -- for example, Group 1 and Group 7 elements bond in a one-to-one ratio (H Cl and Na Cl). no. There are many reasons for including hydrogen among the elements in Group IA. mes also heli-um) in the Periodic Table of the elements. It has little tendency to form positive ions as readily as the alkali Usually, hydrogen is placed in group 1, and helium in group 18: this is the placement found on the IUPAC periodic table. It can sometimes be placed in group 1 and other times in group 17. However, hydrogen is less reactive and a gas at room temperature. As the hydrogen atom has only 1 electron in its outermost shell (ns1) it can lose an electron, forming a uni-positive ion showing properties similar to alkali metals. There are alto-gether five diferent types of arguments that lead to the following conclusions: (1) hydro-gen should be placed in group 1, above lithium; (2) hydrogen should be placed in group 17, above fluorine; (3) hydrogen is to be May 9, 2023 · Hydrogen is not placed in Group 17 because it does not have the same properties as the halogens in that group, such as having a lower electronegativity and a greater tendency to form covalent bonds rather than ionic bonds. Jan 13, 2026 · Hydrogen’s unique position arises because its chemistry allows it to mimic the behavior of elements far across the periodic table, specifically the Halogens in Group 17. Aug 11, 2019 · Why Could hydrogen be placed in group 1 or 7? Hydrogen is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. Why is hydrogen a member of group 7A? Hydrogen has been placed in Group 7A (IUPAC Group 17), because — just like elements in that group — it is monovalent in common compounds and requires just one electron to fill its outer shell. 2 days ago · An element is a pure substance made of only one kind of atom, defined by the number of protons in its nucleus. tmpzblsbwapibgyujxbgnzobwadepxbfuzhjlggtxjbirpfsoxoxibj