Chemical Building Blocks

What are atoms?

• Atoms are tiny particles that make up the Earth's atmosphere.

• Atoms are the smallest unit of energy.

• Atoms are the basic building blocks of matter.

What are molecules?

• two or more substances that are together in the same place but are not chemically combined.

• two or more atoms chemically bonded

• a pure substance composed of two or more elements that are chemically combined.

What is a mixture?

• two or more substances that are together in the same place but are not chemically combined.

• two or more atoms chemically bonded

• a pure substance composed of two or more elements that are chemically combined.

What are compounds?

• two or more substances that are together in the same place but are not chemically combined.

• two or more atoms chemically bonded

• a pure substance made of two or more elements that are chemically combined.

What are chemical properties?

• The state of matter of a substance.

• Characteristics of a substance that describe the appearance of a substance.

• Characteristics of a substance that describe how it reacts or interacts with other substances.

What are physical properties?

• Characteristics of a substance that describe how it reacts with other substances.

• Characteristics of matter that can be observed or measured without changing the composition of the substance.

• Characteristics of matter that can ONLY be observed with a microscope.

What is the smallest unit of an element?

• particle

• atom

• cell

• molecule

What is the combination of two or more atoms called?

• molecule

• element

• compound

• particle

What is a substance composed of two or more different elements?

• compound

• mixture

• element

• solution

What are the characteristics that describe how a substance interacts with other substances?

• biological properties

• chemical properties

• mechanical properties

• physical properties