Question

An element which have maximum number of valance electron is , and why ?? -----

a) Na

b) P


c) Si


d) Al



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Answer 1

Hello, Here is your answer :

The answer will be option (c) Phosphorus

This is because the electronic configuration of Phosphorus is : 2, 8, 5 whereas the electronic configuration of Na : 2,8,1 ; Si : 2,8,4 ; Al : 2,8,3.

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Answer 2

HELLO THERE!!

Valence electrons are the electrons present in the valence (outermost shell).

Given elements are:

Sodium (Na)

Phosphorus (P)

Silicon (Si)

Aluminium (Al).


First, do note their electronic configuration of all the above elements.


Sodium (Atomic number 11):    2, 8, 1

Phosphorus (Atomic number 15):  2, 8, 5

Silicon (Atomic number 14):  2, 8, 4

Aluminium (Atomic number 13): 2, 8, 3


Hence, it is clear that the valence electrons of Phosphorus is more than that of Sodium, Silicon, and Aluminium.


THANKS!