During the formation of magnesium chloride, magnesium atom loses electrons to attain the stable electronic configuration. [1 mark]
A. one
B. two
C. three
D. four
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Solution
The correct answer is option B. two.
The electronic configuration of magnesium is 2, 8, 2.
The electronic configuration of chlorine is 2, 8, 7.
Therefore, magnesium atom loses two electrons to attain the electronic configuration of the nearest noble gas.
The two chlorine atoms gains one electron each to attain the stable electronic configuration of noble gas.