Unit 2A Test Review: Atoms

Front

What equation is used to find the mass of an atom?

Back

p + n = mass of atom

Front

Which subatomic particle has a neutral charge?

Back

Neutrons

Front

Who proposed the atomic theory that states all matter is made of atoms, which are indivisible and indestructible?

Back

John Dalton

Front

What equation is used to find the charge of an ion?

Back

p - e = charge of ion

Front

Which subatomic particle establishes the identity of the element?

Back

Protons

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, Electrons

Front

What is the charge of a proton?

Back

Positive (+1)

Front

What is the charge of an electron?

Back

Negative (-1)

Front

What is the charge of a neutron?

Back

Neutral (0)

Front

What is the significance of the atomic number?

Back

It represents the number of protons in an atom and determines the element's identity.