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covalent bonds share electrons and form a bond. ionic bond uses attraction of positive and negative forces to form a bond(one gains electrons and one loses them)
- Ionic bonds occur between atoms having very different electronegativities, whereas, covalent bonds occur between atoms with similar or very low electronegativity differences. - Ionic bonds occur between metals and non metals. Covalent bonding most commonly occurs between two nonmetals. - In ionic bonding, a complete transfer of electrons occurs, whereas covalent bonding occurs when two (or more) elements share electrons. - Ionic substances are usually seen as crystals. In crystals, a negatively charged ion is surrounded by few positively charged ions and vice versa. - Unlike the ionic compounds, the atoms bounded by covalent bonds exist as molecules. At room temperature, they are mainly seen as gases or liquids. - Since ionic compounds are in crystalline form, they have very high melting points and boiling points compared to covalent molecules. - Ionic bonds have a high polarity and covalent bonds have a low polarity. - In polar solvents (water), ionic compounds are solvated releasing ions as opposed to molecules with covalent bonding. Such solutions are capable of conducting electricity.