Counting Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

How many atoms are in H₂SO₄?

Back

7

Front

What is a molecule?

Back

A molecule is a group 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 chlorine atoms are in MgCl₂(NaCl)₄?

Back

6

Front

What elements are in Mg₃(PO₄)₂?

Back

Magnesium, Phosphorus, Oxygen

Front

Which of the following is an element: NaCl, H₂O, CO₂, O₂?

Back

O₂

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 does the subscript in a chemical formula represent?

Back

The subscript indicates the number of atoms of the element in the molecule.

Front

What is the chemical formula for water?

Back

H₂O