Atoms (and ions) are not made of compounds. Compounds are made of two or more different atoms.
An atom that has gained an electron becomes a negatively charged ion.
anion
Positive
A cation is an atom that has lost one or more electrons. An anion is an atom that has gained one or more electrons.
An ion
An atom that has gained an electron becomes a negatively charged ion.
anion
anion
Positive
surely i don't know sodium atom which can be gained 2 electrons but anyway i thought the answer is Na+2
-3 electrons are gained,i.e,3 electrons are lost by Al and 3 electrons are gained by the other atom nearby.
A cation is an atom that has lost one or more electrons. An anion is an atom that has gained one or more electrons.
It is a negative charge
An ion
An ion.
Electronegativity
Each electron has a 1- charge, so an atom that has gained 5 electrons has a charge of 5-.