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-PS1-2

NGSS.MS-PS1-5

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

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

• chemicals

• reactants

• products

• creations

Tags

NGSS.MS-PS1-5

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

• chemicals

• reactants

• products

• creations

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• Right

• Left

Tags

NGSS.MS-PS1-5

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

• Right

• Left

Tags

NGSS.MS-PS1-5

Count the atoms for each element and select the correct answer: KClO₃

• K = 1 Cl = 3 O = 3

• K = 3 Cl = 3 O = 3

• K = 1 Cl = 1 O = 3

• K = 1 C = 1 l = 1 O = 3

What is the coefficient in the chemical formula?

• 2

• N

• H

• 3