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

1 Answer
Sep 2, 2016

Answer:

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.