Ionic: Magnesium + Oxygen (Mg +O), Lithium and fluorine (Li +F), Copper and Chlorine (Cu +Cl), Metallic: Iron and iron (Fe), Zinc and zinc (Zn), Sodium (Na), Covalent: Carbon and hydrogen (C + H), Chlorine + Chlorine (Cl2), Nitrogen and hydrogen (N + H), Oxygen and oxygen (O2),

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