Identify the number of electrons in the outermost shell of the following elements:

(A) $_{6}^{12}\text{C}$
(B) $_{9}^{19}\text{F}$
(C) $_{14}^{28}\text{Si}$ [Pg. No. 152]

(A) $_6^{12}\text{C}$:

Atomic number = 6

Electronic configuration = 2, 4

Outermost shell electrons = 4

(B) $_9^{19}\text{F}$:

Atomic number = 9

Electronic configuration = 2, 7

Outermost shell electrons = 7

(C) $_{14}^{28}\text{Si}$:

Atomic number = 14

Electronic configuration = 2, 8, 4

Outermost shell electrons = 4