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Ionic bonds are formed when atoms lose or gain electrons and covalent bonds are formed when atoms share electrons. Ionic bonds are stronger than covalent bonds but in water, covalent bonds are stronger than ionic bonds, in which ionic bonds dissociate when in water.
Honestly it really depends. Some ionic bonds are stronger than covalent ones, and the opposite is true in other situations. The only way you can really figure it out is to figure out the energy needed to break each bond and go from there to compare (however generally ionic bonds are harder to break than covalent bonds).
Covalent bonds are pairs of electrons that are shared between two non-metal atoms that have similar electronegativities. Ionic bonds form when electrons are transferred from a metal to non-metal atom, which differ significantly in electronegativity. Ionic bonds tend to be stronger than covalent bonds, but it depends on their properties.
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