The same number as in an atom of Ca, the same as the atomic number of Ca. An ion will have a different number of electrons than protons, so it is not 20. Only neutral atoms have the same number of electrons as protons, which is the same as the atomic number. A calcium ion (Ca+2) has two less electrons than protons (having lost two to fulfill the octet rule), so it has 18 electrons.
20 protons and 18 electrons
By seeing how many protons to electrons there are. More protons, the Ion is positive. More electrons, the Ion is negative.
calcium is a metal which ionizes by electron loss,so a calcium ion has lost to electrons and the positive charge indicates electron deficiency.
The number of protons in an element will be the same regardless of the isotope or ion. To have a different number of protons would change what type of element it is. So, it is not necessary to say "how many protons does calcium-41 have?" because it is the same as saying "how many protons does calcium have?" The answer is the same in any case, the same as the atomic number, 20.
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.
20 protons and 18 electrons
20 p+ 20 n
20 protons, 18 electron's, and 20 neutrons
20
By seeing how many protons to electrons there are. More protons, the Ion is positive. More electrons, the Ion is negative.
20
No. The carbonate ion contains only carbon and oxygen. Since it is a negative ion, it must combine with some positive ion. If that positive ion is calcium, you get calcium carbonate.
An ion is a electrically charged atom (negative ion) has more electrons that protons and positive ion has more protons that electrons)
calcium is a metal which ionizes by electron loss,so a calcium ion has lost to electrons and the positive charge indicates electron deficiency.
The number of protons in an element will be the same regardless of the isotope or ion. To have a different number of protons would change what type of element it is. So, it is not necessary to say "how many protons does calcium-41 have?" because it is the same as saying "how many protons does calcium have?" The answer is the same in any case, the same as the atomic number, 20.
how many protons does the carbonate ion have?
i think it depends how many electrons it has. then you do something like subtract the electrons from the protons. electrons are negative, protons are positive.