Is ZnO (Zinc oxide) Ionic or Covalent? |
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To tell if ZnO (Zinc oxide) is ionic or covalent (also called molecular) we look at the Periodic Table that and see that Zn is a metal and O is a non-metal. When we have a metal and a non-metal the compound is usually considered ionic.
Because we have a metal and non-metal in ZnO there will be a difference in electronegativity between the metal and non-metal. This difference results in an electron(s) being transferred from the metal (lower electronegativity) to the non-metal (higher electronegativity). The results in the metal becoming a positive ion and the non-metal a negative ion. The two opposite charges are attracted and form the ionic bond between atoms in Zinc oxide. --- Helpful Resources Metals, Non-Metals on the P- Table: https://youtu.be/OoooStZQHdA Ionic, Covalent, & Polar Covalent: https://youtu.be/OHFGXfWB_r4 Electronegativity for each element: https://en.wikipedia.org/wiki/Electronegativity --- Because we have a combination of a metal and non-metal ZnO (Zinc oxide) is considered an ionic compound. In general, ionic compounds: - form crystals. - have high melting points and boiling points. - are hard and brittle. - conduct electricity when dissolved in water. - as solids do not conduct electricity. For more chemistry help, see http://www.Breslyn.org. |