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21-12-2020
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Which neutral atom has the same number of electrons as O-² ions

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graycelyndorismond graycelyndorismond

21-12-2020

Answer:

Explanation:

Ar has the same number of electrons as Ca

2+

. These are isoelectronic species.

The atomic number of Ar is 18. It contains 18 electrons. The atomic number of Ca is 20. It contains 20 electrons.

It loses 2 electrons to form Ca

2+

ion with 18 electrons.

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