Question

The element which has the maximum number of valence electrons is:
(a) Na
(b) P
(c) Si
(d) A

Answer 1

(b) P.
Phosphorus (P) has the maximum number of valence electrons, equal to 5.
Electronic configuration of P (15): K L M
                                                        2  8  5
Sodium (Na) has 1, Silicon has 4 and Aluminium (Al) has 3.