Physical Science - Chapter 5 Check

Two or more elements combine to form a(n) _____________________________.

• compound

• mixture

• solution

• alloy

A(n) __________________________ change is one that produces one or more substances that differ from the original substances.

• chemical

• physical

• mechanical

• biological

A physical change is one in which the appearance of a substance changes but the ____________________ stay the same.

• properties

• color

• shape

• size

Space around the nucleus of an atom in which a(n) ____________________ moves is called the energy level.

The attractive force that holds ____________________ together is a chemical bond.

• atoms

• molecules

• ions

• particles

A(n) __________________________ is used to indicate the number of atoms of an element in a compound.

• subscript

• coefficient

• superscript

• prefix

A group of two or more atoms that acts like one atom is a(n) ____________________.

• molecule

• atom

• compound

• element

A(n) ____________________ is a compound that contains the hydroxyl (OH) radical.

• acid

• base

A number that tells whether a substance is an acid or base is the ____________________.

• pH

• temperature

• density

• mass

Classify each of the following as an acid or base. Remember the pH levels of acids and bases, which contain the (OH) radical.

H3BO3

• Acid

• Base