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Features of Group and Periods

Write the ato...

Question

Write the atomic number and electronic configuration of the following elements.

(i) Sodium

(ii) Chlorine

(iii) Neon

(iv) Magnesium

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Solution

(i) Sodium
Atomic number = 11
Electronic configuration = 2,8,1

(ii) Chlorine
Atomic number = 17
Electronic configuration = 2,8,7

(iii) Aluminium
Atomic number = 13
Electronic configuration = 2,8,3

(iv) Silicon
Atomic number = 14
Electronic configuration = 2,8,4

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