Atom structure and periodic table

Front

What is the basic unit of matter?

Back

An atom is the basic unit of matter that consists of a nucleus surrounded by electrons.

Front

What are the three main subatomic particles in an atom?

Back

Protons, neutrons, and electrons.

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 charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What determines the atomic number of an element?

Back

The atomic number is determined by the number of protons in the nucleus of an atom.

Front

What is the electron configuration for an atom with 12 electrons?

Back

The electron configuration is 2-8-2.

Front

Where are the noble gases located on the periodic table?

Back

Noble gases are found in the far right column of the periodic table.

Front

What is the atomic mass of an element?

Back

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

Front

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Atomic number.