Is hydrogen in what group?

Answer 1

Hydrogen is the most difficult element to classify because its properties indicate it to belong in different groups.

• Hydrogen can lose an electron to become a +1 ion; this is similar to to alkali metals. It can form compounds that are analogs of alkali metals compounds such as HCl and HNO3.
• Under very high pressure, it has the properties of a metal. Hydrogen can react with several metals such as nickel to form materials that behave as alloys of two metals.
• Hydrogen can gain an electron to become a -1 ion; this is similar to the halogens. It can form compounds that are analogs of halogen compounds such as NaH and CaH2.
• It also forms covalent bonds and is a nonmetal and a gas at standard conditions anyway such as O2 and N2.
• Additionally, the electronegativity of hydrogen is almost an average of the lowest and highest electronegativity. The situation is similar with the first ionisation energy. This means that it could be classed as a metalloid.

1

Answer 2

Hydrogen, although a gas, is included in the Alkali Earth Metals- Group 1

Answer 3

Hydrogen is classified as part of Group 1 on the Periodic Table, also known as the alkali metals group. However, hydrogen is unique as it also exhibits properties similar to nonmetals.