Table of Contents
- 1 Why hydrogen gas Cannot be placed in Group IA and VIIA of the periodic table at least four point for each?
- 2 Why is it difficult to place hydrogen in the modern periodic table?
- 3 Why hydrogen can be placed in group 1 and 17?
- 4 Why hydrogen can be placed either in group 1 or group 17 in the first period?
- 5 Why hydrogen can be placed in Group 1 and 17?
- 6 Is hydrogen in group 1A?
Why hydrogen gas Cannot be placed in Group IA and VIIA of the periodic table at least four point for each?
1) Hydrogen is a non-metal where as elements of I-A are metals. 3) Hydrogen cannot lose its valence electron. 4) Hydrogen is a gas at room temperature but alkali metals are solids. 5) Unlike Na+ or K+ hydrogen ion (H+) is unstable in water.
Why is it difficult to place hydrogen in the modern periodic table?
It is difficult to decide where hydrogen belongs in the periodic table because of the physical properties of the element. Hydrogen also has an electronegativity (EN = 2.20) halfway between the extremes of the most electronegative (EN = 3.98) and least electronegative (EN = 0.7) elements.
Where should hydrogen be placed in the modern periodic table?
Also, hydrogen exists as a diatomic molecule similar to halogens and produces compounds with both metals and nonmetals. Thus, the hydrogen molecule can be placed in both the 1st as well as the 17th group in the modern periodic table.
Why does hydrogen not fit into this group?
Unlike the group one elements hydrogen is clearly not a metal (it is a gas at room temperature) and is a poor conductor of heat and electricity. It does not readily form H+ cations and forms covalent bonds in most compounds, whereas group 1 metals readily form cations and form only ionic bonds.
Why hydrogen can be placed in group 1 and 17?
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 which is true property of halogen that is …
Why hydrogen can be placed either in group 1 or group 17 in the first period?
Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. 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.
Why the position of hydrogen is controversial in the periodic table?
the position of hydrogen is controversial in periodic table because hydrogen is the only element with out neutron. it belongs to 1 st group but it is not placed there .
Why is hydrogen first placed in the periodic table?
Hydrogen is the first element of the periodic table as its atomic number is one, which means it has only one electron in its atom and thus only one electron is present in its outermost shell.
Why hydrogen can be placed in Group 1 and 17?
Is hydrogen in group 1A?
Although hydrogen is placed at the top of Group 1A in most versions of the periodic table, it is very different from the other members of the alkali metal group. In its elemental form, hydrogen is a colorless, odorless, extremely flammable gas at room temperature, consisting of diatomic molecules of H2.
Why is hydrogen placed in the first group?
In the modern periodic table, hydrogen(H) is placed in group I and this is mainly because it resembles certain properties of group I elements, such as: Hydrogen acts as a strong reducing agent like other alkali metals. The outer electronic configuration of hydrogen (1s1) is similar to group I elements.
Why is hydrogen placed in the same group as the alkali metals?
Why is hydrogen, a nonmetal, placed in the same group as the alkali metals? Because it has eight valence electrons like all the other elements in group 1. Because it has just one valence electron like all the other elements in group 1.