Practice problem
Which of the following is a guaranteed way to tell that a compound is ionic?
If it forms a crystal lattice, it must be ionic.
If it is between an atom that only needs one electron and an atom that only has one extra electron, it must be ionic.
If the electronegativity difference between two elements is very high (>1.7), they must form an ionic bond.
If a substance contains a metal, it must contain ionic bonds.
Type a concept, like “slope” or “photosynthesis”.
