Elements and Compounds Quiz

What is the difference between an element and a compound?

• An element is made up of two or more different types of atoms, while a compound is made up of only one type of atom

• An element and a compound are the same thing

• An element is a pure substance made up of only one type of atom, while a compound is a substance made up of two or more different types of atoms chemically bonded together.

• An element is a mixture of different types of atoms, while a compound is a pure substance made up of only one type of atom

Give an example of an element and a compound.

• Carbon and Salt (NaCl)

• Hydrogen and Carbon Dioxide (CO2)

• Oxygen and Water (H2O)

• Nitrogen and Oxygen (O2)

How are elements represented on the periodic table?

• By their chemical symbols, atomic number, and atomic mass

• By their boiling and melting points

• By their color and texture

• By their location on the Earth's crust

What is a molecule?

• A type of animal found in the ocean

• A group of two or more atoms held together by chemical bonds.

• A type of gas found in the atmosphere

• A type of rock formed by sedimentary layers

Explain the difference between a mixture and a compound.

• A mixture is always a solid, while a compound can be a liquid or gas

• A mixture is a substance composed of two or more elements chemically combined in a fixed ratio, while a compound is a combination of two or more substances that are not chemically combined

• A mixture and a compound are the same thing

• A mixture is a combination of two or more substances that are not chemically combined, while a compound is a substance composed of two or more elements chemically combined in a fixed ratio.

What are the properties of compounds?

• Compounds have unique properties different from the elements that make them up.

• Compounds have random properties that cannot be predicted

• Compounds do not have any properties

• Compounds have the same properties as the elements that make them up

How do elements combine to form compounds?

• Through physical changes

• By mixing them together

• Through chemical reactions

• Through biological processes

What is a chemical formula?

• A recipe for cooking chemicals

• A list of chemical elements in alphabetical order

• A concise way of expressing information about the atoms that constitute a particular chemical compound.

• A type of chemical reaction

Give an example of a common compound and its chemical formula.

• CO2

• H2O

• NaCl

• C6H12O6

Explain the concept of chemical bonding in compounds.

• The process by which atoms repel each other to form a stable molecule.

• The process by which atoms are held together to form a stable molecule.

• Chemical bonding is the process of converting molecules into individual atoms.

• Chemical bonding is the process of separating atoms to form a stable molecule.