Chemical Formula and Chemical Reaction Vocabulary

The red numbers in the image below represent ________

• subscripts

• coefficients

• the number of atoms

The blue numbers in the image below represent ________

• the number of compounds

• coefficients

• subscripts

The substances at the beginning of a chemical equation are called the ____

• product

• reactants

• chemical symbol

How many hydrogen atoms are in this chemical formula?

• 4 hydrogen atoms

• 1 hydrogen atom

• 2 hydrogen atoms

Law of conservation of matter states that ____.

• Matter can be created

• Matter can be destroyed

• Matter can not be created nor destroyed

The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.

• True
• False

Element or compound?
H₂O

• element
• compound

A way of writing the name of a compound using chemical symbols is called a

• chemical equation

• chemical formula

• chemical reaction

An electron in the outermost energy level of an atom is called

• a valence electron

• an oxidation electron

• binary compound

A statement in which chemical formulas are used to describe a chemical reaction is called a

• chemical equation

• oxidation number

• chemical formula