Chapter 9 Elements and Chemical Bonds Lesson 2

Multiple Choice

Which of the following best describes a compound?

• A substance made of only one type of atom

• A substance made of two or more different elements chemically bonded

• A mixture of different molecules not chemically bonded

• A single atom with unique properties

Multiple Choice

Which of the following statements best describes a covalent bond?

• A bond where electrons are transferred from one atom to another

• A bond where electrons are shared between nonmetals

• A bond between metals and nonmetals

• A bond that always forms ions

Multiple Select

Which of the following are typical properties of covalent compounds?

• High melting points

• Usually gases or liquids at room temperature

• Good conductors

• Poor conductors

Multiple Choice

In a polar molecule like water, which atom attracts the shared electrons more strongly?

• Hydrogen

• Oxygen

• Both equally

• Neither atom

Multiple Choice

What is the main difference between an atom, a molecule, and a compound as shown in the diagram?

• Atoms are single particles, molecules are made of the same elements, and compounds are made of different elements.

• Atoms are made of molecules, molecules are made of compounds, and compounds are made of atoms.

• Atoms are always larger than molecules, and compounds are the smallest.

• Molecules and compounds are the same thing.