Answer:
2
Explanation:
The compounds XCl₂ and X₃N₂ shows that the valency of X is 2. If they are ionic compounds then X is a metal. The metals having valency=2 mostly reside in group-2.
Alpha has the greatest mass- A.
the answer to that question is a
144 u
The average atomic mass of carbon is approximately 12 u.
Multiply 12 x 12:
12 x 12 = 144
