Question

Atomic number of mg and al are 12 and 13, respectively.Write down their electronic configuration.



b. Mention the period of the modern periodic table to which the above two elements belong. Give reason for your answer.

Answer 1

mg = 2,8,2
al = 2,8,3

b = magnesium belongs to 3rd period and
aluminum belong to 3rd period because of their atomic numbers.

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