A calcium atom (Ca) has 20 protons.
Another way of saying this is: the atomic number of calcium is 20.
Calcium has 20 protons and electrons and a variable number of neutrons, depending on the isotope.
Calcium has 20 Protons. You can determine the amount of Protons in an Element by checking the top number of an element. This is called the Atomic number. Calcium has 20 protons
Calcium has 20 protons and Chlorine has 17, so 20+17= 37 protons.
carbon has : 36000 protons 124000 electrons 348850 calcium
20.
Polonium has 84 protons.
Curium has 96 protons.
Calcium (element number 20) has 20 protons and 20 electrons.
Calcium has 20 protons.
Calcium has 20 protons and electrons and a number of neutrons different for each isotope..
Calcium has 20 protons and sulphur has 16 protons and hence calcium has more protons
An atom's atomic number tells us how many protons it has. If we reference a periodic table, we see that calcium's atomic number is 20. Thus, calcium has 20 protons.