Question

Plz batado sidhe 50 point

Answer 1

Answer: A is in group 1A

B is in group 3A

C is in Group 5A

D Is in group 7A

Explanation:

When B and D combine the formula becomes BD3

Answer 2

It is stated that electrons are distributed in three shells, thus the atoms are of third period.

In 3rd period, atom having 1 valence electron is sodium (A), atom having 3 valence electrons is aluminium (B), atom having 5 valence electrons is phosphorus (C), atom having 7 valence electrons is chlorine (D).

Thus A lies in group 1, B lies in group 13, C lies in group 15 and D lies in group 17.

On combining B and D the formula will be AlCl3.

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