Chemical Formulas & Equations

The law of conservation of mass states that matter ___________________.

• cannot enter into chemical reactions

• cannot be created or destroyed

• cannot form different substances

• cannot be modeled

Tags

NGSS.MS-PS1-5

Chemical formulas are used to represent _________________.

• reactions

• substances

• processes

• none of the above

Tags

NGSS.MS-PS1-1

Chemical equations are used to represent _________________.

• reactions

• substances

• processes

• none of the above

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The small numbers under and to the right of element symbols in a formula are called _________________.

• element symbols

• exponents

• coefficients

• subscripts

The large numbers before a chemical formula that are used as multipliers are known as __________________.

• element symbols

• exponents

• coefficients

• subscripts

A ___________________ uses chemical formulas, plus signs, and an arrow to represent a chemical reaction

• chemical formula

• chemical equation

• element symbol

• inventory

Tags

NGSS.MS-PS1-5

The materials we start with in a reaction are known as __________________.

• chemicals

• reactants

• products

• creations

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The materials we end with in a reaction are known as __________________.

• chemicals

• reactants

• products

• creations

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Reactants are found on the _______________ side of the arrow in a chemical equation.

• Right

• Left

Tags

NGSS.MS-PS1-5

Products are found on the _______________ side of the arrow in a chemical equation.

• Right

• Left

Tags

NGSS.MS-PS1-5