Matter and Atoms

Front

What is an electron?

Back

An electron is a subatomic particle with a negative charge that orbits the nucleus of an atom.

Front

What is the relationship between atoms, elements, and compounds?

Back

An element is composed of just one kind of atom. A compound is composed of more than one element, each of which is composed of a different type of atom.

Front

What is a molecule?

Back

A molecule is defined as two or more atoms that are held together by chemical bonds and act as a unit.

Front

What does the nucleus of an atom contain?

Back

The nucleus of an atom contains protons and neutrons.

Front

What are atoms made up of?

Back

Atoms are made up of subatomic particles.

Front

What is a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom.

Front

What is a neutron?

Back

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

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances and is made up of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the atomic number?

Back

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