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 must gain two electrons.
It will lose 2 electrons.
45
Si gains 4 electrons.
Se will gain electrons
In phosphene it gain 4 electrons. Phosphate lose 4 electrons
It can lose 1.
it will lose 3 electrons
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
It must gain two electrons.
It will lose 2 electrons.
45
Selenium will gain two electrons and arsenic will gain three electrons
Silicon gains 4 electrons.
Si gains 4 electrons.
Metals usually lose electrons, this is why many charges are positive.