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.
Ca must lose 2 electrons to have a complete 3n shell, which has 8 valence electrons. The ion would have a charge of 2+: Ca^2+.
It'll have to gain one to have a stable octet.
Nitrogen has five valence electrons as a neutral atom, but it is shooting for eight. So it needs to gain three more electrons.
Magnesium has a charge of 2+ and oxygen 2- Magnesium will lose the two "extra electrons" in its valence shell when creating an ionic bond with oxygen. The oxygen will gain these two electrons.
It can do both. It gains electrons in Phosphene, loses electrons in Phosphate.
It loses 2 electrons to obtain the argon configuration of 8 valence electrons.
The valence electrons of calcium will tend to give away electrons, as it is an alkaline earth metal with two valence electrons. This makes it more energetically favorable for calcium to lose these two electrons and achieve a full outer electron shell by forming a 2+ cation.
A calcium atom must lose 2 electrons to have 8 valence electrons, achieving a full outer shell and stability. Calcium is in group 2 of the periodic table, so it has 2 valence electrons originally. By losing 2 electrons, it will have a stable electron configuration similar to a noble gas.
Phosphorus, with 5 valence electrons, needs to gain 3 electrons to have a full set of 8 valence electrons. This would allow it to achieve a stable octet configuration, resembling the noble gas configuration of argon.
Phosphorus wants to gain three electrons to have 8 valence electrons.
calcium loses two electrons, becoming a +2 ion
Ca must lose 2 electrons to have a complete 3n shell, which has 8 valence electrons. The ion would have a charge of 2+: Ca^2+.
Sulfur has 6 valence electrons. To achieve 8 valence electrons, sulfur must gain 2 electrons to fill its outer shell and satisfy the octet rule.
Phosphorus wants to gain three electrons to have 8 valence electrons.
They will gain 3 electrons from something with 3 valence electrons.
Aluminum would lose 3 electrons to become like argon. Argon has a full valence shell with 8 electrons, so aluminum, with 3 valence electrons, would need to lose these electrons to achieve a full valence shell configuration similar to argon.
In a reaction u need two valence electrons to gain or share two valence electrons.