How many protons are in calcium? (* hint: the atomic number of calcium is 20).

question 5 options:

11

2

5

20

The answer to your question is: 20

Explanation:

Atomic number is the number of proton and atom has. Each element has a specific number of protons, if the number of protons change, then this is a new element.

Mass number is the number of protons and neutrons and atom has.

                       Mass number = protons + neutrons

Data

Number of protons = ?

Atomic number = 20

Then,

           atomic number = number of protons = 20

i think the answer is a and b

i wish you luck

third one with arrows on top of each other going the same direction