Question

18-11
The atomic numbers of elements of a period are given below;
elements
Li
Be
B
C
N
atomic number
3
5
6
7
the valency of an element is determined by
a. the number of valence electron present in the outermost sale of the atom
b. the number of electron present in atom
c. the number of valence electron present in the first two cells
d. the number of valence electrons present in the nucleus​

Answer 1

Answer:

i dont no sorry.rearly sorry.

Answer 2

Answer:

Right Option is a. the number of valence electron present in the

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