Question

(a) An atom of an element X has 3 electrons in its third shell .

1 state its electronic configuration .

2 State the number of protons in one atom of X.

3. if the mass number of X is 27 ,how many neutrons are present in one atom of X
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Answer 1

Answer:

electronic configuration is 2,8,3

the number of protons in one atom would be 13

14 neutrons are present in one atom of X