What is the octet rule?
How does the rule explain the common ion of fluorine and of calcium?
The octet rule is when an element contains 8 valence electrons.
The rule explains the common ions of fluorine and calcium to show how much is needed to gain/lose electrons to get that perfect 8. For example, fluorine needs toga an electron thus becoming a F^-1 while calcium needs to lose 2,b becoming Ca^-2.
1 answer
If Ca metal loses 2e it becomes Ca^2+.