Calcium has an atomic number of 20. Thus calcium's number of protons is 20. To balance out these protons' positive charges, calcium also is found with 20 negatively charged electrons.
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Calcium (element number 20) has 20 protons and 20 electrons.
Um, the element calcium? Protons, neutrons, electrons..
Calcium is an element, which means that it is made up protons/electrons and neutrons. Each calcium atom contains a total of 20 protons/electrons, and 20 neutrons.
Calcium has 20 protons, 20 electrons and 20 neutrons in its most commonly found isotope.
Calcium has twenty protons and twenty electrons. The main isotope of calcium also has twenty neutrons.