Atoms, Molecules, and Compounds

Front

What is the basic unit of matter?

Back

An atom.

Front

What are molecules made of?

Back

Molecules are made of two or more atoms bonded together.

Front

What is a compound?

Back

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

Front

How many atoms are in a molecule of water (H2O)?

Back

3 atoms (2 hydrogen atoms and 1 oxygen atom).

Front

What is the difference between an element and a compound?

Back

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

Front

What is a diatomic molecule?

Back

A molecule that consists of two atoms of the same or different elements, such as O2 or CO.

Front

What is the chemical formula for carbon dioxide?

Back

CO2.

Front

What does it mean for atoms to share electrons?

Back

It means they are forming a covalent bond.

Front

What is the significance of the periodic table in understanding atoms and compounds?

Back

The periodic table organizes elements based on their properties and helps predict how they will react with each other.

Front

What is a covalent bond?

Back

A covalent bond is a type of chemical bond where two atoms share one or more pairs of electrons.