Which compound contains both covalent and ionic bonds?Group of answer choicesCO2NaClH2OCaCO3

The compound that contains both covalent and ionic bonds is CaCO3.

Here's why:

1. CaCO3 is calcium carbonate. In this compound, calcium (Ca) forms an ionic bond with carbonate (CO3).

2. An ionic bond is a type of chemical bond that involves a metal and a non-metal ion (or polyatomic ions such as carbonate) through electrostatic attraction. In this case, calcium is the metal and carbonate is the polyatomic ion.

3. The carbonate ion (CO3) itself is a covalently bonded species. It consists of one carbon atom and three oxygen atoms. The bonds between the carbon and oxygen atoms are covalent bonds, where electrons are shared between atoms.

4. A covalent bond, on the other hand, is a type of chemical bond where two or more atoms share electron pairs. In this case, the carbon and oxygen atoms in the carbonate ion are sharing electrons.

So, in CaCO3, calcium forms an ionic bond with the carbonate ion, and within the carbonate ion, the carbon and oxygen atoms are covalently bonded. Therefore, CaCO3 contains both covalent and ionic bonds.