Question

please look at the following picture and give me the answers ( sorry for being rash but im in a hurry )

Answer 1

Answer:

(i) A - NITROGEN.

   B - FLUORINE.

   C - MAGNESIUM.

(ii) Element B lies in group number 17.

(iii) Element C lies in period number 3.

(iv) Valency of A - 3.

     Valency of B - 1.

     Valency of C - 2.

(v) Atomic number of A - 7.

    Atomic number of B - 9.

    Atomic number of C - 12.

    Atomic mass of A - 14.0067 u.

    Atomic mass of B - 18.998403 u.

    Atomic mass of C - 24.305 u.

(vi) Electronic configuration of A - 2,5

     Electronic configuration of B - 2,7

     Electronic configuration of C - 2,8,2

Explanation:

I HOPE THIS HELPS U.

PLEASE MARK ME AS BRAINLIEST.