Gallium typically loses three electrons when forming compounds, resulting in a +3 oxidation state. This behavior is due to its position in group 13 of the Periodic Table, where it has three valence electrons. In some cases, gallium can also exhibit a +1 oxidation state by losing just one electron, but the +3 state is more common.
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
It will lose 2 electrons.
45
Gallium is a mono-atomic metal element. So their atoms are atoms, and as many as you have!
5s orbital
Ga3+ has 31 - 3 = 28 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.
Se will gain electrons
Gallium is a non metal element. There are 31 electrons in a single atom.
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.
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.
Gallium is a mono-atomic metal element. So their atoms are atoms, and as many as you have!
Phosphorus wants to gain three electrons to have 8 valence electrons.