Chemical formulas

Front

What is the smallest building block of matter?

Back

atom

Front

What are the products of the reaction NH3 -> N2 + H2?

Back

N2 + H2

Front

When a molecule is made up of more than two different elements (e.g., CO2), what do we call this?

Back

a compound

Front

How many oxygen atoms are in a molecule of H2O?

Back

1

Front

How many hydrogen atoms are in a molecule of H2O?

Back

2

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements.

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

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 chemically bonded.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is the chemical formula for water?

Back

H2O