Atoms, Molecules, Compounds

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a compound?

Back

A substance formed when two different elements bond together.

Front

What is the atomic number?

Back

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

Front

What are metalloids?

Back

Elements that have properties of both metals and non-metals.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms bonded together.

Front

What is the molecular formula for water?

Back

H₂O, which indicates it is made of two hydrogen atoms and one oxygen atom.

Front

What is a chemical bond?

Back

The force that holds atoms together in a molecule or compound.

Front

What is the significance of the periodic table?

Back

It organizes all known elements based on their atomic number and properties.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.