Question

What do all Group 1 elements have in common?​

Answer 1

Answer:

Group 1 elements are hydrogen and helium

Explanation:

They have relative atomic mass

Answer 2

Hii there !!

Explanation:

They have the same valance electrons I.e 1.

if their valance electrons are same their valancy is also same ,1.

they all are electro positive in nature (can lose electrons easily).

hence they are metallic.

hope it helps you !!