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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.
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Ga3+ has 31 - 3 = 28 electrons
Se will gain electrons
It has 31 electrons. The easiest way to find an electron is that the atomic number tells you how many protons and electrons on the periodic table. It will change if the element is an ion which will gain or lose an electron.
It needs to gain 3 electrons than to lose 5 electrons. So phosphorus has to gain 3 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.
45
It will lose 2 electrons.
Selenium will gain two electrons and arsenic will gain three electrons