It needs to gain 3 electrons than to lose 5 electrons. So phosphorus has to gain 3 electrons.
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
It will lose 2 electrons.
45
5s orbital
Si ( Silicon) is in the same group as carbon. As a consequence it has four outer electrons. These four electrons covalently bond to other atoms, in the same manner as carbon. Si does NOT gain or lose electrons in the sense of ionisation.
Se will gain electrons
it will lose 3 electrons
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
It will lose 2 electrons.
45
Silicon gains 4 electrons.
Phosphorus wants to gain three electrons to have 8 valence electrons.
5s orbital
Aluminum will lose 3 electrons to form Al3+ ion.
18 electrons
Krypton can gain a maximum of 2 electrons to achieve a stable octet configuration, forming the Kryptonide anion. It does not typically lose electrons.
Si ( Silicon) is in the same group as carbon. As a consequence it has four outer electrons. These four electrons covalently bond to other atoms, in the same manner as carbon. Si does NOT gain or lose electrons in the sense of ionisation.