Atoms, Compounds, Elements, and Molecules

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom. They determine the identity of an element.

Front

What is the nucleus of an atom?

Back

The nucleus is the central region of an atom where protons and neutrons are located.

Front

What is a chemical formula?

Back

A chemical formula is a written expression that shows the elements in a compound and the number of atoms of each element.

Front

What are electrons?

Back

Electrons are negatively charged particles that orbit the nucleus of an atom and are involved in chemical bonding.

Front

What is a molecule?

Back

A molecule is a combination of two or more atoms that are chemically bonded together.

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.

Front

What is the electron cloud?

Back

The electron cloud is the region around the nucleus of an atom where electrons are likely to be found.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.