Counting Atoms and Molecules

Front

What is the number written below & to the right of a chemical symbol called?

Back

Subscript

Front

What is the number placed in front of a chemical formula called?

Back

Coefficient

Front

How many oxygen atoms are in Fe(NO₃)₂?

Back

6

Front

What is a substance made up of chemically combined elements called?

Back

Compound

Front

Which elements are present in a molecule of potassium carbonate, K₂CO₃?

Back

Potassium, carbon, and oxygen

Front

What is an atom?

Back

The smallest unit of an element that retains its properties.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a chemical formula?

Back

A way to represent a substance using symbols for its elements.

Front

What does a coefficient in a chemical equation indicate?

Back

The number of molecules or moles of a substance.

Front

What is the difference between a reactant and a product?

Back

Reactants are substances that start a chemical reaction; products are substances formed by the reaction.