Question

Question #3a3a1

Answer 1

20 protons=20+ charge, 20 neutrons=0 charge, total charge=20+

Explanation:

Calcium has an atomic number of 20 and a mass number of 40.

The atomic number is the number of protons in the atom's nucleus and the mass number is the number of protons AND neutrons in the atom's nucleus.

Thus, if we have an atomic number of 20 we have 20 protons. To calculate the number of neutrons from the number of protons is like this:

`"neutrons"="mass number"-"atomic number"`

Now that we have the number of protons and neutrons we can calculate the charge of the nucleus.

Each proton has a 1+ charge, so we can find the charge by #1*20= 20#

Each neutron has no charge, so we can find the charge by `0*20=0`

Thus, the charge of calcium's nucleus is 20+.