Question

The element A belong to second period and 17 th group and the element B belong third period
and second group of the periodic table.(Symbols shown are not real)
a . Write the subshell electronic configuration of A
b .To which block does B belong? What is its valency?
c .Give the formula of the compound by A and B



plssss helppppp meeeh
its urgent

Answer 1

Answer:

A = Flourine ( F)

B = Magnesium ( Mg)

a) 1s2 2s2 2p5

b) s block

c) F and Mg

Answer 2

answer

A fluorine (f)

B magnesium (MG )

explanation

1) 1s2 2s2 2p5

2)yes block

3) fluorine and magnesium