Parts of the Atom

Front

What particle(s) make up the mass number?

Back

Protons and neutrons.

Front

How many protons does an atom of Sodium (Na) have?

Back

11 protons.

Front

The atomic number is the number of ____ in the nucleus. It's the element's 'identification'!

Back

Protons.

Front

What two particles are in the nucleus of an atom?

Back

Protons and neutrons.

Front

There are equal numbers of ___ and ___ in an atom (if it's neutral).

Back

Protons and 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 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.