Chemistry Fall Semester Exam Review

Front

What is the number of electrons in the outermost energy level of an oxygen atom?

Back

6

Front

Why does a golf ball have more mass than a tennis ball?

Back

Because it contains more matter.

Front

What is the smallest particle of an element that retains the properties of that element?

Back

Atom

Front

What is a physical property of water?

Back

It melts below room temperature.

Front

What particles are found in the nucleus of an atom?

Back

Protons and neutrons.

Front

Define an atom.

Back

The smallest unit of an element that retains the properties of that element.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is a chemical property?

Back

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

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is the difference between an element and a compound?

Back

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