Grade 8 atomic structure

Front

Where can you find most of an atom's mass?

Back

In the nucleus.

Front

What is the name of the subatomic particle that is neutral?

Back

Neutron.

Front

The total number of protons and neutrons in an atom is called the...

Back

Mass number.

Front

The nucleus of an atom contains 12 protons and 13 neutrons. If the atom is electrically neutral, how many electrons does this atom have?

Back

12.

Front

How many neutrons does a sodium atom have?

Back

12.

Front

What is the center of an atom called?

Back

Nucleus.

Front

What are the negatively charged particles in an atom?

Back

Electrons.

Front

What is the positively charged particle in an atom?

Back

Proton.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons.