None.
Calcium loses 2 electrons to form an ion.
In phosphene it gain 4 electrons. Phosphate lose 4 electrons
Bromine will gain one electron.
It needs to lose to in order to have the same number of outer electrons as Argon. The Noble gas configuration of [Ar]4s2 confirms this.
calcium has 20 electrons.when it loses 2 electrons, it has 18 electrons.
Usually calcium loses 2 electrons, that's why calcium is found in Group 2 of the periodic table.
it loses two electrons when forming a compuond.
2 electrons are lost from calcium, forming Ca2+ ion
Calcium loses two electrons to form the cation Ca2+.
It looses two.
Selenium will gain two electrons and arsenic will gain three electrons
In phosphene it gain 4 electrons. Phosphate lose 4 electrons
1
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
Selenium can gain 1 electron or loss 2, 4, 6 electrons.
Bromine will gain one electron.
Three. In fact, any element in the same column of the periodic table as nitrogen will also gain three electrons when forming an ion.
One, and only one.