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.
Three. In fact, any element in the same column of the periodic table as nitrogen will also gain three electrons when forming an ion.
Ca + I2 --> CaI2 Each calcium gives up 2 electrons to iodine when forming calcium iodide.
Bromine will gain one electron.