I believe it is 2, seeing it is a metal, and has 2 valence electrons. Correct me if I'm wrong, I don't have my Periodic Table with me (Calcium -> Ca?).
Calcium carbonate has 16 valence electrons. Calcium contributes 2 valence electrons, while each oxygen atom contributes 6 valence electrons.
One atom of calcium donates two electrons to one atom of oxygen during the formation of the compound CaO. Calcium loses two electrons to achieve a stable octet configuration, while oxygen gains two electrons to complete its outer shell.
There are 8 electrons in the third energy level of a calcium atom.
First, calcium oxide is an ionic compound and so does not form molecules. In one formula unit (ionic equivalent of a molecule) of calcium oxide there is 1 oxygen (8 protons) atom and 1 calcium atom (20 protons) for a total of 28.
Calcium would need to lose 2 electrons to have 8 valence electrons. This is because calcium has 2 valence electrons in its outer shell, and by losing these 2 electrons, it can achieve a stable octet configuration like the noble gas argon.
The neutral atom of calcium has 20 electrons; the cation Ca2+ has 18 electrons.
Calcium will lose two electrons to gain the noble gas configuration of Argon.
A calcium ion (Ca2+) loses two electrons from an atom to achieve a stable octet electron configuration. This results in a +2 charge on the calcium ion.
There are 20 electrons in a calcium atom.
A calcium atom tends to lose two electrons. This is because calcium has two electrons in its outermost shell (the fourth period of the periodic table), and it typically seeks to achieve a stable electron configuration by losing these two valence electrons. As a result, calcium commonly forms a +2 cation (Ca²⁺) in chemical reactions.
Calcium has 20 electrons in the neutral atom.
Calcium oxide has 20 electrons from the calcium atom, and 8 electrons from the oxygen atom, totaling 28 electrons.
I am not sure what you mean by atoms, i think you mean electrons (part of an atom).Calcium is in Group 2 of the periodic table so this means that in order to become stable it will lose 2 electrons.
Calcium, as an element, has 20 electrons. But when becomes an ion, it loses two electrons, becoming Ca+2. Therefore, as an ion, calcium has only 18 electrons.18
Calcium is a metal element. There are 20 electrons in a single atom.
20 electronsIt has 20 protons and 20 neutrons.20 electrons
A calcium atom has 20 electrons, as it has 20 protons to maintain a neutral charge. A calcium ion, specifically Ca2+, has lost two electrons, so it has 18 electrons.