Why can hydrogen be placed in Group 1 or 7?

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.

Why are the elements placed in Group 1?

The Group 1 elements are called the alkali metals. All the Group 1 elements are very reactive . They must be stored under oil to keep air and water away from them. Group 1 elements form alkaline solutions when they react with water, which is why they are called alkali metals.

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 …

Is hydrogen included in group 1?

Alkali metals are the chemical elements found in Group 1 of the periodic table. Although often listed in Group 1 due to its electronic configuration, hydrogen is not technically an alkali metal since it rarely exhibits similar behavior. …

Where do you think should hydrogen be placed in the modern periodic table?

The position of hydrogen in the periodic table is unclear because it resembles both the alkali metals and halogens in some of its properties. 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.

Is hydrogen a part of group 1?

Group 1A — The Alkali Metals. Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The alkali metals have only one valence electron in their highest-energy orbitals (ns1).

Why hydrogen is best placed separately in the periodic table of elements?

Hydrogen possesses unique properties which make it stand apart from other elements. Its properties resemble those of alkali metals as well as halogens – it can lose one electron like alkali metals and gain one electron like halogens. Hence, it is placed separately on the top left corner of the Modern Periodic Table.

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 can hydrogen be placed in Group 1 and 17?

Hydrogen can be placed in both group 1 and group 17 because its electronic configuration is similar to both the groups. Hydrogen is placed in group I of the modern periodic table due to following reasons:- (1) It shows outer electronic configuration similar to group I elements (i.e.

Why is hydrogen placed with the elements in Group 1A?

However, recent print outs of periodic tables shows that hydrogen is in group 1A or the alkali group of metals. Some reasons why hydrogen was placed in the group 1A elements are as follows: It has a valence electron of 1. The valance electronic configuration of hydrogen is the same with the group 1A elements.

Why is hydrogen in group with reactive metals?

Group 1 of the periodic table includes hydrogen and the alkali metals. Because they have just one valence electron, group 1 elements are very reactive. As a result, they are found in nature only in combination with other elements. Alkali metals are all solids at room temperature.

Why is sodium in Group 1?

Sodium is a Group 1 element (or IA in older labelling styles). Group 1 elements are often referred to as the “alkali metals”.