AP CHEM Unit 1

Front

What are the three main subatomic particles of an atom?

Back

Protons, Neutrons, Electrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What do the vertical columns in the Periodic Table represent?

Back

Groups.

Front

What do the horizontal rows in the Periodic Table represent?

Back

Periods.

Front

How do you calculate the number of neutrons in an atom?

Back

Subtract the atomic number from the mass number.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the formula for calculating moles from mass?

Back

Moles = Mass (g) / Molar Mass (g/mol).