Problem: A chloride ion (Cl–) has the same number of electrons as a neutral atom of ______.

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An element can be represented as:


You can determine the identity of the element using its atomic number:

Atomic number (Z): 

represents the identity of the element
reveals the number of protons
in a neutral element:

            # of protons = # of electrons

Given: chloride ion (Cl)

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Problem Details

A chloride ion (Cl) has the same number of electrons as a neutral atom of ______.

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