Unit 1

Front

What is a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom. It determines the atomic number of an element.

Front

How many protons does Fermium have?

Back

Fermium has 100 protons.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

Which element is found in PERIOD 1, GROUP 18?

Back

Helium is found in PERIOD 1, GROUP 18.

Front

What is an atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

Which part of the atom is NOT found in the nucleus?

Back

Electrons are not found in the nucleus; they orbit around it.