An atom of calcium contains 20 protons. How many electrons does it have?

1 Answer
anor277
Sep 2, 2016

Hmmm, for #Ca#, #Z=20#, i.e. their are 20 positively charged nuclear particles...........

Explanation:

Well if there are 20 protons, 20 positively charged nuclear particles, a neutral metal should contains how many negative particles? If you want to be sure, look up a Periodic Table.

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