➔ Which compound has both ionic and covalent bonds? A. Ammonium chloride B. Carbon dioxide C. Ethyl ethanoate D. Sodium chloride

Choice A. Ammonium chloride.

Explanation:

Consider the bonds in each of the four compounds.

Ammonium chloride is an ionic compound. Each

The and ions in are connected with ionic bonds.

What make special is that its cation is polyatomic. In other words, each ion contains more than one atoms. These atoms (one atom and four atoms) are connected with covalent bonds. Therefore, has both ionic and covalent bonds.

Carbon dioxide is a covalent compound. Each molecule contains two double bonds in total. molecules have no ionic bond.

The name "ethyl ethanoate" might sound like the name of a salt (think about sodium ethanoate.) However, in reality, ethyl ethanoate is an ester. The "ethyl" here refers to the part, originating from ethanol. On the other hand, "ethanoate" refers to the part, which can be obtained from ethanoic acid.

These two parts are connected with a covalent single bond. (The in ethanoic acid is connected to the in ethanol.) As a result, there's no ionic bond in ethyl ethanoate, either.

Sodium chloride is an ionic compound. Both the ion and the are monoatomic. While the and in sodium chloride are connected with ionic bonds, neither nor contains covalent bond.

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons