Question

which of the following does not have one electron in its valence shell
a)Na b)Li c)H d)Ca

Answer 1

Calcium has 2 as its valency.

And sodium, lithium and hydrogen has one valency.

So, the correct answer is d).

Answer 2

HEYA ❤️

ANSWER :

d). Ca ( CALCIUM)

EXPLANATION :

LET SEE THE ELECTRONIC CONFIGURATION OF ALL THESE ELEMENTS :

a). Na .. atomic number = 11

e.c = 2,8,1

HENCE SODIUM IS HAVING ONE ELECTRON IN ITS VALENCE SHELL. THEREFORE a) Na IS NOT THE CORRECT ANSWER.

b). Li... atomic number = 3

e.c =2,1

HENCE LITHIUM IS HAVING ONE ELECTRON IN ITS VALENCE SHELL. THEREFORE, b). Li IS NOT THE CORRECT ANSWER.

c). H... atomic number = 1

e.c = 1

HENCE HYDROGEN IS HAVING ONE ELECTRON IN ITS VALENCE SHELL. THEREFORE, c). H IS NOT THE CORRECT ANSWER.

d). Ca... atomic number = 20

e.c = 2,8,8,2

CALCIUM IS HAVING TWO ELECTRONS IN ITS VALENCE SHELL. THEREFORE d). Ca is the correct answer.

HOPE IT HELPS ❤️

★Thank you★