Front

What is located in the 'A' position of a correctly written atomic symbol?

Back

The mass number.

Front

What are the positive particles of an atom called?

Back

Protons.

Front

Which part of an atom is used to identify the element?

Back

The number of protons.

Front

Which two components of an atom contribute to its mass?

Back

Protons and neutrons.

Front

What is the central region of an atom where its neutrons and protons are located?

Back

The nucleus.

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

How do isotopes of an element differ from each other?

Back

Isotopes of an element have the same number of protons but different numbers of neutrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.