Atoms, Elements, Molecules, and Compounds

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of protons, neutrons, and electrons.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Each element is made up of atoms that have the same number of protons.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. Molecules can consist of the same or different elements.

Front

What is a compound?

Back

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

Front

What is the chemical formula for sulfuric acid?

Back

H₃SO₄

Front

How many elements are in the compound Al₂O₃?

Back

There are 2 elements: Aluminum (Al) and Oxygen (O).

Front

TRUE OR FALSE: Every compound is a molecule but not every molecule is a compound.

Back

TRUE

Front

How many hydrogen (H) atoms are in 4 H₂O molecules?

Back

There are 8 hydrogen atoms.

Front

How many elements are in glucose (C₆H₁₂O₆)?

Back

There are 3 elements: Carbon (C), Hydrogen (H), and Oxygen (O).

Front

What is the difference between an atom and a molecule?

Back

An atom is a single unit of an element, while a molecule is a group of two or more atoms bonded together.