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ICSE Class 9 Chemistry Question 22 of 22

Atomic Structure — Question 22

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Question

Question 5(1994)

The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of :

(i) aluminium

(ii) phosphorus

Answer

Electronic configuration of :

(i) Aluminium has atomic number = 13. Therefore, electronic configuration is 2, 8, 3.

(ii) Phosphorus has atomic number = 15. Therefore, electronic configuration is 2, 8, 5