Question

H2 is a molecule but H ia an atom.Give reason​

Answer 1

Answer:

Hydrogen is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. ... Because hydrogen is a nonmetal and forms H- (hydride anions), it is sometimes placed above the halogens in the periodic table. Hydrogen also forms H2 dihydrogen like halogens.

Explanation:

i hope it helps you

please mark me as brainliest

Answer 2

Answer:

Atomicity is the number of atoms that make a molopeecule of an element. Helium is considered monoatomic because it has 1 atom in its molecule, but hydrogen is considered diatomic because it has 2 atoms of hydrogen in its molecule.

that is the reason why h2 is a molecule but h is an atom

Explanation:

hope it will help you please mark my answer as brainliest and give thanks to my answer