How many protons does an atom of Calcium have in its nucleus?

Answer 1

A calcium ion has 20 protons, the same as its atomic number. The number of electrons depends on the charge on the ion. For the most common calcium ion with a charge of +2, the number of electrons is 18; 20 - 18 = +2. The number of neutrons depends on the isotope that is ionized and is equal to the mass number of the isotope minus the atomic number of 20.

Answer 2

Calcium will always have 20 protons (its atomic number). Usually it will be in a +2 state as an ion which means it will have 18 electrons.so they have 15 nucleus

Answer 3

It has 20 protons and 20 neutrons.
20 electrons

Answer 4

Calcium's atomic number is 20. Therefore, There are 20 protons in a Calcium atom (all in the nucleus, of course).

Answer 5

Calcium, no matter what form it is in, will always have 20 protons.

Though it generally forms a cation, not an anion.

Answer 6

Atomic number of calcium is 20. So there are 20 protons in its nucleus.

Answer 7

An atom of calcium has 20 protons in its nucleus.

Answer 8

20 i think :)
20

Answer 9

20

Answer 10

A calcium atom has 20 protons, 20 electrons and 20 neutrons