kekoanabor19
07.05.2021 •
Chemistry
A solution that uses change of state to make water more available to this community
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Ответ:
2 F atoms
Explanation:
A Ca atom has a valence number of +2, which means that when ionized, it will give up two electrons. In turn, a F atom has a valence number of -1, which means it can only accept 1 electron when ionized. So to accommodate the two electrons from Ca atom, we need 2 F atoms.