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Adam Adam
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June 16, 2009
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Resolved Question

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If a chlorine atom gains or loses a valence electron, it becomes a charged particle called a/an ___________.?

A. flourine
B. neutron
C. chloride atom
D. ion
Midnight Shine by Midnight Shine
Member since:
May 16, 2006
Total points:
1,139 (Level 3)

Best Answer - Chosen by Voters

D. ion.

When atoms gain or lose electrons, they become ions because their charges are no longer zero.

Choice A is incorrect because when atoms gain or lose electrons, their identities DO NOT change.

Choice B is the incorrect for similar reasons. A neutron is a particle inside the nucleus. How could a chlorine atom become just one subatomic particle with the loss or gain of an electron?

Choice C is a tempting answer because it says "chloride". However, it would be correct only if it said "chloride ion" because chloride is the name of an ion of chlorine. It is no longer an atom because it does not have a neutral charge now that it lost or gained an electron (a particle with charge).

Note: Do not mix this up with atoms with different numbers of neutrons; those are not ions, but isotopes.
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