a
O2+
b
Ca2+
c
K+
d
Mg2+
Explanation
Correct Option
dVideo Explanation
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Discussions (13)

Viobuasi
6 years ago
the correct answer is D because the magnesium ion will gonna lose the two valence electrons to attain a stable octet electronic configuration. bet it can never be A because oxygen is negatively charged

nadida
3 years ago
oxygen has a atomic number of 8,oxygen ion has a atomic number of ten since 2 positively charged electron are added to it

Babliwa
2 years ago
A & D reason being that Oxygen will equally gain 2 electrons just as magnesium will loss 2elctrons and they will both arrive at atomic number of 10 which makes them is electronic.
In another vein, Elements that are isoelectronic with neon are Oxygen, Flourine, Sodium, magnesium, Aluminum.




