Atoms, Elements, Compounds, Mixtures

Front

What is the atomic number?

Back

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

Front

What is an electron?

Back

An electron is a subatomic particle with a negative charge, found outside the nucleus in the electron cloud.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that appears different throughout and can be physically separated, such as trail mix.

Front

What is a compound?

Back

A compound is a substance made up of two or more elements that are chemically combined, like table salt (NaCl).

Front

What is a proton?

Back

A proton is a subatomic particle with a positive charge, found inside the nucleus of an atom.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a neutron?

Back

A neutron is a subatomic particle with no charge, found inside the nucleus of an atom.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that appears the same throughout and cannot be easily separated, like saltwater.

Front

What is the difference between a compound and a mixture?

Back

A compound is made of two or more elements chemically combined, while a mixture is a combination of substances that can be separated physically.