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4 June, 21:10

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

+2
Answers (1)
  1. 4 June, 23:37
    0
    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.
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