RE Chemical Reactions & Atomic Structure REVIEW

Based on its location on the partial periodic table shown above, which element would you predict has chemical properties that are most similar to argon (Ar)?

• A. Chlorine (Cl)

• B. Helium (He)

• C. Nitrogen (N)

• D. Zinc (Zn)

Tags

NGSS.MS-PS1-1

Helium has an atomic number of two because it has two (a)   .

• atoms

• protons

• neutrons

• molecules

Tags

NGSS.MS-PS1-1

Select all of the following events in which a chemical change occurs.

• Chocolate syrup dissolves into warm milk.

• Sugar is heated until it turns into a brown caramel sauce.

• A piece of paper is cut up into 12 pieces.

• Two unknown liquids are mixed together and a gas is produced.

• Toast is lightly charred in a toaster.

Tags

NGSS.MS-PS1-2

What atoms combine to make up a molecule of water?

• 1 hydrogen, 1 oxygen

• 1 hydrogen, 2 oxygen

• 2 hydrogen, 1 oxygen

• 2 hydrogen, 2 oxygen

Tags

NGSS.MS-PS1-1

Calcium carbonate, a common material found in chalk and antacids, is shown decomposing in the balanced chemical equation below. Count the number of atoms on the reactant and product side of the equation. How many more atoms are in the products than the reactants?

• 0

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

What three fundamental particles are atoms made of?

• molecules

• protons

• electrons

• carbon

• neutrons

Tags

NGSS.MS-PS1-1

Which of the following correctly summarizes the process of ice turning into water and then into steam?

• a liquid to a solid to a gas

• a solid to a gas to a liquid

• a liquid to a gas to a solid

• a gas to a liquid to a solid

• a solid to a liquid to a gas

Tags

NGSS.MS-PS1-4

A student creates a ball-and-stick model to represent the atomic scale of a substance. Which of these best describes the model?

• 1 molecule with 10 atoms

• 1 element with 10 molecules

• 10 molecules representing 10 elements

• 10 elements representing 10 molecules

Tags

NGSS.MS-PS1-1

Identify the type of transformation that has taken place.

• A) Chemical Transformation

• B) Physical Transformation

Tags

NGSS.MS-PS1-2

What type of change occurred?

• A) Chemical Change

• B) Physical Change

Tags

NGSS.MS-PS1-2