Elements from the Right Hand Side of the Periodic Table especially from the halogens and the oxygen groups form negative ions in ionic compounds.
A metal and a non-metal.
ionic compound is a blinary ionic compound is one that is made up of only 2 element , ex: NaCl, CaF2, Li2O a blinary ionic compound is made up of a metal and a nonmetal a positive cation and a negative anion
Bromine (Br) All nonmetals except the noble gasses will react with lithium to form ionic compounds.
An ionic compound forms when atoms of an element of low electronegativity transfer one or more electrons per atom to atoms of an element of high electronegativity. The resulting cations, formed from the atoms of the element of low electronegativity, and anions, formed from the element of high electronegativity, are held together by mutual electrostatic attractions to form the ionic compound.
According to wikipedia, Magnesium Oxide is an ionic compound.
If the first element in it is a cation, it is just about always an ionic compound.
Bromine (Br) All nonmetals except the noble gasses will react with lithium to form ionic compounds.
Metals form generally forms ionic bonds as in salts.Carbon form covalent bonds, for ex.
Its is an Ionic compound
Sulfer is an element, only compounds can be ionic. For example, NaCl is an ionic compound- something that has a metal and a non-metal.
Sodium chloride (NaCl) is an ionic compound.
K is an element. It is elemental Potassium metal.
Ca (calcium) is an element, not a compound. and it can only form ionic compounds.