Question

What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons?

Answer 1

Most iotas don't have eight electrons in their valence electron shell. A few particles have a couple of electrons in their external shell, while a few molecules need just a couple of electrons to have an octet.

Complete step by step answer:
A few molecules have almost eight electrons in their valence shell and can acquire extra valence electrons until they have an octet. At the point when these particles acquire electrons, they obtain a negative charge since they currently have a greater number of electrons than protons. Adversely charged particles are called anions. Most nonmetals become anions when they make ionic mixtures.
Most particles don't have eight electrons in their valence electron shell. A few particles have a couple of electrons in their external shell, while a few iotas need just a couple of electrons to have an octet. In situations where an iota has three or less valence electrons, the molecule may lose those valence electrons effectively until what remains is a lower shell that contains an octet.
Particles that lose electrons gain a positive charge accordingly in light of the fact that they are left with less contrarily charged electrons to adjust the positive charges of the protons in the core. Emphatically charged particles are called cations. Most metals become cations when they make ionic mixtures.

Note: In situations where an iota has three or less valence electrons, the molecule may lose those valence electrons effectively until what remains is a lower shell that contains an octet.