Unit 4: Chemical Equations and Reactions Review

Front

What is a chemical symbol?

Back

A one or two letter representation of each element, with the first letter always capitalized.

Front

How many Aluminum atoms are in Al₂O₃?

Back

2

Front

Balance the equation: 2Li + Cl₂ -> ?

Back

2Li + Cl₂ -> 2LiCl

Front

How many Sodium atoms are in Na₂CO₃?

Back

2

Front

What is the part in red in H₂ + O₂ -> H₂O?

Back

Subscript

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.

Front

What is a product in a chemical reaction?

Back

The substances that are formed as a result of a chemical reaction.

Front

What does it mean to balance a chemical equation?

Back

To ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the difference between a subscript and a coefficient?

Back

A subscript indicates the number of atoms in a molecule, while a coefficient indicates the number of molecules.