Question

answers fast please​

Answer 1

period is 3

electronic configuration of a is equal to 2 8 1

electronic configuration of d is equal to 2 8 7

compound formed by a and b is equal to a d

Answer 2

A–1st group

B–13th group

C–15th group

D–17th group

B–2,8,3

D–2,8,7

AlCl3

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