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Yes, ionic bond are always between metals and non-metals. This is because metals have low ionization energies (which make them good conductors) and non-metals have high ionization energies. This makes it easy for metals to give their electrons to non-metals to form the chemical bond between them.
Yes. Ionic bonds are formed when two atoms have electronegativities that are not close to each other, so that an atom pulls an electron off of another atom. This means two nonmetals do not form ionic bonds because their electronegativities are too close together, as they form covalent bonds instead.
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