ATOMIC STRUCTURE

Front

What is the smallest unit of matter that retains the properties of an element?

Back

Atom

Front

What are the three main subatomic particles in an atom?

Back

Protons, Neutrons, Electrons

Front

What is the charge of a neutron?

Back

Neutral (no charge)

Front

What is the charge of a proton?

Back

Positive charge

Front

What is the charge of an electron?

Back

Negative charge

Front

Where are protons located in an atom?

Back

In the nucleus

Front

Where are electrons located in an atom?

Back

In electron shells or energy levels surrounding the nucleus

Front

What is the nucleus of an atom?

Back

The central part of an atom containing protons and neutrons

Front

What is the mass of a proton compared to a neutron?

Back

Approximately equal; both have a mass of about 1 atomic mass unit (amu)

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom of that element