Periodic Table and Chemical Equations Review

What is a pure substance?

• A material made up of two or more different types of atoms bonded together.

• A material that consists of a single type of atom.

• A material made up of two or more substances that are physically mixed but not chemically combined.

• A material that can be separated into simpler substances by physical means.

Which of the following is an example of a mixture?

• Salt (NaCl)

• Air

• Gold (Au)

On the periodic table, metals are typically found in which area?

• On the right side

• On the left side and in the center

• Only in the center

• At the top

Which of the following elements is a metalloid?

• Sodium (Na)

• Silicon (Si)

• Oxygen (O)

• Gold (Au)

Which of the following is a characteristic of nonmetals?

• High conductivity

• Malleability

• Dull appearance

• High density

• Balanced

• Unbalanced

What is required to balance a chemical equation?

• Changing the subscripts in the chemical formulas

• Adding catalysts to the reaction

• Adjusting the coefficients in front of the chemical formulas

• Increasing the temperature of the reaction

Which of the following is a pure substance?

• Seawater

• Brass

• Diamond

• Milk

What distinguishes a mixture from a pure substance?

• Mixtures can be separated into their components by chemical means.

• Mixtures have a fixed composition.

• Mixtures can be separated into their components by physical means.

• Mixtures are made of a single type of atom.

Which of the following elements is a nonmetal?

• Iron (Fe)

• Copper (Cu)

• Carbon (C)

• Zinc (Zn)