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15 November, 12:51

If calcium has two valence electrons and sulfur has six, how many calcium atoms are needed to form an ionic bond with sulfur?

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Answers (2)
  1. 15 November, 13:00
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    3 calcium atoms would be needed.
  2. 15 November, 13:20
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    1 atom of calcium is needed to form an ionic bond with sulfur.

    If calcium has two valence electrons and it needs to denote these two electrons to achieve a noble gas electronic configuration, and sulfur has six electrons, it needs two extra electrons to achieve a noble gas electronic configuration. Thus a ionic bond is formed between sulfur and calcium, in which 1 atom of calcium donate its 2 electrons to 1 atom of sulfur and formation of bond takes place.
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