Calcium chloride
2 marks · EasyHow many electrons are lost by one calcium atom and how many are gained by each chlorine atom when forming calcium chloride? Give your answers in the form: electrons lost by Ca, electrons gained by each Cl.
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2, 1
Also accept: 2 and 1; Ca loses 2, each Cl gains 1
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Marking points
B1 · 1 mark · States that the calcium atom loses two electrons.
B1 · 1 mark · States that each chlorine atom gains one electron.
Worked solution
A calcium atom loses 2 electrons. Each chlorine atom gains 1 electron. Answer: 2, 1