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The difference between an atom like Ca, and an ion of an atom, like Ca2+, is A) the number of protons. B) the number of neutrons. C) the number of proteins. D) the number of electrons.

Respuesta :

QuarkyFermion
since Ca is a metal it can only lose electron therefore it is a cation.
answer is D since it has already lose electrons.

dont forget to put it as the brainliest answer if it helps.

Answer: Option (D) is the correct answer.

Explanation:

Atomic number of an atom represents the number of protons present in an atom. Also, when an atom is neutral then the number of protons equal the number of electrons of the atom.

For example, electronic distribution of calcium is 2, 8, 8, 2. So, when calcium loses two electrons to gain stability then it becomes [tex]Ca^{2+}[/tex].

That is, number of electrons decreases.

Hence, we can conclude that the difference between an atom like Ca, and an ion of an atom, like Ca2+, is the number of electrons.

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