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

Sep 2, 2016

#### Answer:

Hmmm, for $C a$, $Z = 20$, 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.