gain 3
Selenium will gain two electrons and arsenic will gain three electrons
Selenium can gain 1 electron or loss 2, 4, 6 electrons.
gain 2 electrons
Sulfur gains 2 electrons to become stable.
Neither. It has a stable octet in its ground state.
Selenium may lose 2, 4 or 6 electrons and may gain 2 electrons.
Selenium will gain two electrons and arsenic will gain three electrons
Selenium can gain 1 electron or loss 2, 4, 6 electrons.
gain 2 electrons
The oxidation states of selenium are: 1 to 6 and -1, -2.
Metals will LOSE electrons to become stable.
lose 2
Sulfur gains 2 electrons to become stable.
Compounds will gain or lose electrons in order to reach a more stable state, ideally a full valence shell.
to become stable
A stable electron configuration.
Stable I think.