Question 3 (b)
Name two elements that have two electrons in their outermost shell

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Solution

The electronic configuration of magnesium (12) is: 2, 8, 2.
The electronic configuration of calcium (20) is: 2, 8, 8, 2.
Hence, magnesium (Mg) and calcium (Ca) are elements that have two electrons in their outermost shell.

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