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KiRa [710]
3 years ago
14

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

English
1 answer:
grin007 [14]3 years ago
3 0

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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