Chemical Reactions

According to the law of conservation of mass, matter cannot be created or ________

Tags

NGSS.MS-PS1-5

True or False: In a complete chemical equation, there must be the same number of atoms of each element on the reactants and products side.

• True

• False

Tags

NGSS.MS-PS1-5

In a chemical reaction, atoms ________ and form new bonds.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Look at the chemical equation.

How many atoms of mercury (Hg) are in the reactants?

Tags

NGSS.MS-PS1-1

Look at the chemical equation.

Is it written correctly to show the Law of Conservation of Mass?

• Yes

• No

Tags

NGSS.MS-PS1-5

Look at the chemical equation.

How many atoms of nitrogen (N) are in the products?

Tags

NGSS.MS-PS1-5

Look at the chemical equation.

Is it written correctly to show the Law of Conservation of Mass?

• Yes

• No

Tags

NGSS.MS-PS1-5

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

NGSS.MS-PS1-5

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

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2