Chemistry Final Exam Review

Front

What two types of measurements make up DENSITY?

Back

Mass and Volume.

Front

What is true about an atom?

Back

Atoms are mostly empty space.

Front

According to the octet rule, most elements need how many valence electrons?

Back

8.

Front

Which of the following substances are elements? Water, Salt, Carbon Dioxide, Hydrogen?

Back

Hydrogen.

Front

List the coefficients in order: 4,3,2, 2,2,3, 4,2,3, 1,2,3.

Back

4, 3, 2.

Front

Define density in terms of mass and volume.

Back

Density is the mass of an object divided by its volume.

Front

What is the octet rule in chemistry?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom and determines the element's identity.