Fall Semester Review

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What does the '-131' in Iodine-131 indicate?

Back

It indicates the atomic mass of the isotope.

Front

Is flammability a chemical or physical property?

Back

Flammability is a chemical property.

Front

What are valence electrons?

Back

Electrons in the outermost energy level of an atom.

Front

What does the octet rule state?

Back

Most elements want to have 8 valence electrons.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is a physical property?

Back

A characteristic of a substance that can be observed without changing its chemical composition.

Front

What is a chemical property?

Back

A characteristic that can only be observed during a chemical reaction.