CAIE A-Level Chemistry AS 1.3.6 Determine the Electronic Configuration Questions

Practise determining atomic and ionic electronic configurations from proton number and charge, using accurate full or shorthand shell and subshell notation.

Exam points

Determine the electronic configuration of atoms and ions from atomic or proton number and charge using full or shorthand notation.

[Maximum number: 1]

What is the electronic configuration of $\mathrm{Mg}^{2+}$ ?

$1 s^{2} 2 s^{2} 2 p^{6}$

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}$

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{2} 4 s^{2}$

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CAIE A-Level Chemistry AS 1.3.6 Determine the Electronic Configuration Questions question 1