In sodium sulfide (Na₂S), two sodium (Na) atoms each lose one electron, resulting in a total loss of two electrons. Sulfur (S) gains two electrons to achieve a stable electron configuration. Thus, in Na₂S, there are two electrons lost by sodium and two electrons gained by sulfur.
Atoms that have lost or gained electron(s) are called ions. If they are positively charged (lost an electron(s)), they are called cations. If they are negatively charged (gained an electron(s), they are called anions.
Ion
An atom that has gained an electron becomes a negatively charged ion.
They form an ionic compound.
In the ion of barium, two electron are lost to follow the octet rule (to have a complete valence electron shell).
Generically an "ion", specifically gained an electron an "anion", lost and electron a "cation".
Atoms that have lost or gained electron(s) are called ions. If they are positively charged (lost an electron(s)), they are called cations. If they are negatively charged (gained an electron(s), they are called anions.
Just electron
A charged chlorine atom, or a chlorine ion, would have gained or lost an electron. If it gained an electron, it would have a charge of -1. If it lost an electron, it would have a charge of +1.
neutron
It gains 1.
Ion
It forms a new atom.
They form an ionic compound.
-Apex: They form an Ionic Compound.
An atom that has gained an electron becomes a negatively charged ion.
An atom has no charge. An ion is an atom that has either gained or lost an electron giving it a charge. An atom that has gained an electron is called an anion and is negative, while an atom that lost an electron is called a cation and is positive.