What is the type of bond between atoms in the CaO molecule?

Explanation of the solution to the problem: the type of bond in the calcium oxide (CaO) molecule is ionic.
This type of bond occurs in compounds that contain metal and non-metal atoms at the same time, for example, the following compounds also belong to this group (all bases and salts + class – hydrides): NaOH (Na – metal, O, H – non-metals) , K2SO4 (K – metal, S and O – non-metals), NaH (Na – metal, H – non-metal), Li2O (Li – metal, O – non-metal).

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