Chemical Reaction Review

A chemical change is different than a physical change because in a chemical change

• chemicals are used

• molecules do not physically touch

• a new substance is formed and in a physical no new substance is formed

• the change can be seen but in a physical change it cannot

Tags

NGSS.MS-PS1-2

How many Carbons are present on the reactant side?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many Hydrogens are on the product side of this chemical equation?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.

• reactants
• products
• neutrals
• energizers

the starting materials in a chemical reaction

• Products

• Reactants

• Starters

• Energizers

The new substances that are made after a chemical equation are the

• Products

• Reactants

• Starters

• Enders

Tags

NGSS.MS-PS1-5

The blue numbers in the image below represent ________

• subscripts

• coefficients

True or False

In a chemical reaction, no new types of atoms are created, and no atoms are destroyed.

• true

• false

Tags

NGSS.MS-PS1-5

NaCl in this chemical reaction is called the

• product

• reactant

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

NGSS.MS-PS1-1

A number in front of a chemical formula in an equation that indicates how many molecules of each reactant and product are involved in a reaction.

• Coefficient

• reactant

• subscript

• product

Tags

NGSS.MS-PS1-5