Question

chemistry fans plz help me!!!!​

Answer 1

Answer:

I can answer second question.

while going down a group atomic size goes on increasing.

Explanation:

Wile going down a group a new shell is added. Thus the distance between the outermost electron and the nucleus goes on increasing. As a result, the atomic size increases in spite of the increased nuclear charge.

hence, the atomic size of H is bigger than B