Oxygen is in group 16 of the periodic table. An oxygen ion (O2-) has a charge of -2. Which of the following would be most likely to combine with an oxygen ion to form a new compound?
A.
a calcium ion with a charge of +2
B.
a fluoride ion with a charge of -1
C.
a neon atom that has no charge
D.
a sulfide ion with a charge of -2

A a calcium ion with a charge of +2

Explanation:

Think of it this way:

every atom needs 8 electrons in the outer shell to be happy.

If an electron has a negative 2 charge that means that it needs 2 more electrons to be happy and calcium needs to lose to of its electrons to be happy. So calcium will happily give its two outer elctrons to oxygen.

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.

the answer is symmetrical : )