Unit 2 Review

Front

What is the negatively charged particle found in the rings of an atom?

Back

Electron

Front

How many protons are in Sodium?

Back

11

Front

Why is an electron important within the atom?

Back

It determines chemical reactivity.

Front

How many electrons are in Potassium?

Back

19

Front

Which subatomic particles contribute to the mass of an atom?

Back

Protons and Neutrons

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 nucleus of an atom?

Back

The central part of an atom containing protons and neutrons.

Front

What determines the identity of an element?

Back

The number of protons in its nucleus.