It loses 2 electrons to obtain the argon configuration of 8 valence electrons.
Six electrons
Lose 2.
The calcium atom (Ca) loses two valence electrons to form a calcium ion (Ca2+).
It must gain two electrons.
Calcium has 2 valence electrons and it typically loses these 2 electrons to achieve a stable configuration.
It is going to lose electrons
Bromine must gain one electron
Calcium atom will generally lose two electrons to form Ca2+ ions. Calcium will not accept (gain) electrons.
two electron should be lost
The calcium atom (Ca) loses two valence electrons to form a calcium ion (Ca2+).
It must gain two electrons.
Calcium has 2 valence electrons and it typically loses these 2 electrons to achieve a stable configuration.
Phosphorus wants to gain three electrons to have 8 valence electrons.
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.
It is going to lose electrons
P has 5 valence electrons so it can gain 3 electrons or lose 5 electrons to have a full valence shell.
Phosphorus wants to gain three electrons to have 8 valence electrons.
Atoms with eight valence electrons usually do not gain or lose electrons. Atoms with one, two, or three valence electrons will lose electrons.
Bromine must gain one electron