Magnesium sulfate, MgSO4 is a salt containing the magnesium ion Mg2+ and the polyatomic ion, sulfate, SO42-. These ions are ionically bonded. However within the sulfate ion, sulfur is covalently bonded to oxygen.
This is an ionic compound, for example a salt as potassium chloride.
This bond is ionic.
Nitrogen trichloride is a covalent compound.
It is an ionic compound.
It is ionic
There are countless compounds which consist of both ionic and covalent bonds. An example is Sodium Nitrate. It's formula is NaNO3 . The bond between the Sodium ion(Na+) and the Nitrate ion (NO3-) is ionic. The bonds between the Nitrogen atom and the Oxygen atoms in the nitrate ion are covalent.
Polar covalent. The difference in electronegtivity is insufficient for an ionic bond
MgCl2 is an ionic compound. there is a large difference in electronegativity between Mg and Cl.
Xe is an inert element that can't be combined in a chemical compound to form neither ionic or covalent bond.
Br2 is a covalent compound. It consists of two bromine atoms sharing electrons to form a covalent bond.
Sodium hydroxide has ionic bonds. A compound never is any kind of bond.
Sodium hydroxide is a good example of a compound with both ionic and molecular bonds because the bond between the sodium ion and hydroxide ion is ionic, but the bond between the oxygen atom and the hydrogen atom in the hydroxide ion itself is covalent. Sodium hydroxide is typically referred to as an ionic compound because the ionic bond dominates its chemistry.