Question

Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell.

Answer 1

yes they have , what u mean this as a question, it s a statement.. is it ?

Answer 2

these three elements are ,boron ,carbon and beryllium .

(A) boron- it's atomic number is 5 and it has 3 electrons in its outermost shell.

(B) carbon- it's atomic number is 6 and it has 4 electrons in its outermost shell.

(C) beryllium- it's atomic number is 4 and it has 2 electrons in its outermost shell.

hope it helps !
thank you !