Atoms in Chemical Reactions

Chemical reactions happen when?

• The bonds between atoms grow until a substance changes states.

• The atoms in the reactants break apart into different substances.

• The atoms that form extended structures rearrange themselves to form new substances.

• The bonds between atoms in reactants break and reform to make new substances.

What happens when an electric current is introduced into a macroscopic amount of water?

• The water will start to boil.

• The water changes states from a liquid into a gas.

• The current produces an explosive hydrogen gas.

• The current causes the water to part outward from the source of the current.

What is a chemical equation?

• A shorthand notation that describes chemical reactions.

• A tool for scientists to solve for the reactants of a product.

• A tool for scientists to solve for the reactants of a product.

• A tool for scientists to solve for the reactants of a product.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Which of these is NOT true of a chemical equation?

• The reactants are on the left side of the equation.

• The products are on the right side of the equation.

• The two sides of the equation are divided by an equal sign.

• There may be more than one reactant and more than one product.

How many types of chemical reactions did we learn about?

• 4

• 5

• 6

• 8

Which of these is not a reaction we learned about?

• Synthesis

• Decomposition

• Redox

• Acid Base

Tags

NGSS.MS-PS1-2

The elephant toothpaste activity we did demonstrated what type of reaction?

2H2O2 (aq) -> 2H2O (l) + O2 (g)

• Single Replacement

• Decomposition

• Combustion

• Synthesis

Tags

NGSS.MS-PS1-2

The brewers yeast we used in the elephant toothpaste activity was?

• Reactant

• Product

• Catalyst

• Waste Product

What happens during a chemical reaction where molecules break apart?

• The atoms of a molecule will dissolve into their original elements.

• The atoms of a molecule will completely dissolve into the environment.

• The atoms of a molecule will switch places with the atoms of another molecule.

• The atoms of a molecule will form new groups of atoms that make up two or more new substances.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which of these is a chemical equation that demonstrates the combination atoms of multiple substances?

• A balanced chemical equation.

• A physical equation.

• A mathematical equation.

• An unbalanced chemical equation.

Tags

NGSS.MS-PS1-5