Chemical Reactions

In a ___________change, a substance changes into a different substance.

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chemical reaction, bonds are broken and new bonds are formed that create new substances. In what are the bonds broken?

• Reactants

• Products

• Atoms

• Catalysts

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same
• that matter can only be changed into new substances by introducing a catalyst
• that matter exists in the same state throughout any chemical change
• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

Tags

NGSS.HS-PS1-7

In total how many Al atoms are shown in this formula? 4Al₂O₃

• 2

• 8

• 6

• 4

In total how many F atoms are shown in this formula?

6MgF₂

• 2

• 6

• 8

• 12

An gel ice pack getting cold after you put it in the freezer for an hour. Shows what type of change?

• Chemical Change

• Physical Change

___________________ are the elements or compounds that are formed during a chemical reaction.

• Polymers

• Bonds

• Reactants

• Products

an atom or molecule which has gained or lost one or more of its valence electrons

• Covalent Bond
• Chemical Formula
• Ion
• Compound

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Bond in which one or more electrons from one atom are removed and attached to another atom, resulting in positive and negative ions which attract each other

• Covalent Bond

• Ionic Bond

• Reaction Bond

• Null Bond

What tells us the number of atoms of each element in a compound

• Coeffecient

• Exponent

• Chemical Formula

• Calculator