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[Angel71717]

Use the term molecule,ion,elements,atom,or compound to describe each substance: Mg^2+, Na^+,SO^2- , CH
4 4

[Angel71717]

Use the term molecule,ion,elements,atom,or compound to describe each
the 4s were suppose to be under SO and CH

[neodarwinian]

Mg^2+ Is an ion, a cation to be precise. ( ion, an element that has donated or accepted an/a electron(s) ) ( also an atom )

Na^+ Is also an ion. Cation. ( also an atom )

SO^2- is a ion, a anion, and a compound made up of two atoms.

Do you mean...?

CH4
===========This is a molecule as it is covalently bonded all around. Two elements, or atoms. Carbon and four hydrogens.