Calcium:
protons are 20
neutrons are 20, 22, 23, 24, 26 or 28
electrons are 20
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.
Calcium has 20 protons, 20 electrons and 20 neutrons in its most commonly found isotope.
Each calcium atom has 20 protons and 20 electrons. This is because the atomic number, which is 20 for calcium, represents the number of protons in the nucleus of its atom, and in a neutral atom, the number of electrons is equal to the number of protons.
Calcium (element number 20) has 20 protons and 20 electrons.
Calcium's atomic number is 20. That means that it has 20 protons. To make it neutral then, an atom of calcium must also have 20 electrons.
Calcium has 20 protons and electrons and a number of neutrons different for each isotope..
Calcium has 20 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a calcium atom = Mass number - 20
Calcium has 20 protons and electrons and a variable number of neutrons, depending on the isotope.
Well, first, I feel I should point out that if the atomic number is not 20, then it's not calcium.A neutral atom of calcium has 20 protons and 20 electrons.
Calcium has 20 protons and electrons. The symbol for calcium is Ca and its atomic number is 20.
Calcium (Ca) has the atomic number 20, this means it has 20 protons and 20 electrons.
An atom of calcium-42 has 20 protons, as calcium has an atomic number of 20. Since the atomic number represents the number of protons in an atom, calcium always has 20 protons. Calcium-42 also has 22 neutrons, calculated by subtracting the atomic number from the atomic mass (42 - 20 = 22). The number of electrons in a neutral atom is equal to the number of protons, so a calcium-42 atom would have 20 electrons.