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Ionic compounds form when electrons transfer from one atom to another. Covalent compounds form when atoms share electrons, resulting in no net loss or gain of electrons as seen in ionic compounds.
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In an ionic bond, an electron leaves one atom to join another, while a covalent bond is a sharing of electrons between two atoms. Polar covalent bonds occur when two atoms share an uneven number of electrons.
Carbon dioxide, or CO2, forms a covalent bond. Any compound made up of non-metals will form a covalent bond, while compounds made of a metal and non-metal form an ionic bond. A covalent bond takes place when two atoms share electrons, thus binding the two atoms together.
In chemistry, ionic bonds and covalent bonds are both methods atoms use to combine into larger molecules by swapping or sharing outer electrons. An atom's energy level is determined by the number and configuration of electrons orbiting the atomic nucleus. As atoms collide, those with unstable electr