Calcium metal is an electron donor.
As a group 2A metal, calcium has two valance electrons that it tends to give away to non metals, forming the Ca 2+ cation.
Ca --> Ca2+ + 2 e-
However, often people say calcium, when they mean calcium ion. Be sure which you are asking about.
Calcium has to lose 2 electrons to form noble gas configuration.
Technically, any atom could have 40 electrons, but it would have a very weird charge. However, Zirconium has 40 electrons without being an ion.
No, but some of them can donate all their valence electrons. Let us take a ridiculous example. Copper is [Ar]4s2d9. Donating 11 valence electrons would be energetically impossible. Now Vanadium is different and is [Ar]4s2d3 and so only needs to donate 5 valence electrons. This can be and is done V2O5 is a very stable compound - vanadium pentoxide.
If two electrons are lost from a neutral calcium atom (Ca), the electron configuration would change to 1s^2 2s^2 2p^6 3s^1. This is because calcium has 20 electrons in its neutral state, and losing two electrons would result in a configuration with 18 electrons.
I would imagine, logically, Calcium would react with every element except the Noble Gases - as they already have full outer energy levels, thus being unreactive. You will often find one calcium reacting with one element from group 6, for example Oxygen. CaO (as they strive to reach a full outer shell.)
Calcium and chlorine would form an ionic bond when they combine to create calcium chloride. Calcium, being a metal, will donate electrons to chlorine, a nonmetal, resulting in the transfer of electrons and the formation of an ionic bond.
If calcium lost two electrons, it would have the same number of electrons as argon. Calcium has 20 electrons in its neutral state, and losing two electrons would leave it with 18 electrons, which is the same as argon.
Calcium has twenty electrons in each atom.
calcium loses two electrons, becoming a +2 ion
Under normal conditions of temperature and pressure, oxygen gains electrons. The outermost orbital in an oxygen atom has four electrons., i.e., the outermost orbit has six electrons. Hence, to reach the octet configuration, oxygen can take two more electrons. Thus, oxygen is electronegative.
The neutral atom of calcium has 20 electrons; the cation Ca2+ has 18 electrons.
A Calcium ion with a -1 net charge would have 21 electrons. Calcium as a stable element has 20 electrons.
Calcium has to lose 2 electrons to form noble gas configuration.
Technically, any atom could have 40 electrons, but it would have a very weird charge. However, Zirconium has 40 electrons without being an ion.
A calcium ion with a 2+ charge (Ca2+) has lost two electrons. A neutral calcium atom (Ca) has 20 electrons, so Ca2+ would have 18 electrons.
You would need 2 more electrons to make a calcium ion neutral, since calcium has 20 protons (+20 charge) and 18 electrons (-18 charge), resulting in an overall +2 charge. Adding 2 more electrons would balance out the charge to become neutral.
Calcium is expected to lose electrons in a chemical reaction because it is a metal located in group 2 of the periodic table, which typically loses electrons to achieve a stable electron configuration. Calcium will typically form a 2+ cation by losing 2 electrons in reactions.