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

10 elements representing 10 molecules

Which two of the following can the Periodic Table be used for?

the symbols used to identify each element

what it can combine with to make a chemical

to find out when each element was discovered

The balanced chemical equation of hydrogen peroxide (H₂O₂) decomposing is shown below. Select all correct statements about it. 2H₂O₂ → O₂ + 2H₂O

A. There are two peroxide molecules on the reactant side.

B. There are eight atoms in the reactants.

E. Mass must be conserved so there are an equal number of atoms in the reactants and products.

C. There are two atoms on the reactant side.

D. Mass must be conserved so there are an equal number of molecules in the reactants and products.

Consider the reaction of sodium and water below and select all the correct statements about it. 2Na + 2H2O → 2NaOH + H2

There are as many atoms in the reactants as there are in the products.

Mass is conserved throughout the reaction.

There are more sodium atoms in the reactants than in the products.

There are more hydrogen atoms in the reactants than in the products.

What is the atomic number?

the number of protons in the nucleus

the number of protons and neutrons in the nucleus

the number of neutrons in the nucleus

the number of protons in the energy levels

What is the mass number?

the number of protons and neutrons in the nucleus

the number of protons in the nucleus

the number of neutrons in the nucleus

the number of protons and electrons in the atom

Which of the following is an example of a chemical change?

a piece of metal expands when it is heated

The Law of Conservation of Mass states

that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

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

What happens to the total mass when a chemical reaction occurs in a closed system?

The total mass remains the same

Chemical Reactions & Atomic Structure (Sischo)

Authored by Bryson Sischo

Chemistry

8th Grade

NGSS covered

Used 7+ times

Chemical Reactions & Atomic Structure (Sischo)

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35 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Chlorine (Cl)

Helium (He)

Zinc (Zn)

Nitrogen (N)

Tags

NGSS.HS-PS1-1

DROPDOWN QUESTION

30 sec • 1 pt

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

Protons

Neutrons

Electrons

Nucleons

Tags

NGSS.MS-PS1-1

MULTIPLE SELECT QUESTION

30 sec • 2 pts

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

B. Toast is lightly charred in a toaster.

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

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

A. Chocolate syrup dissolves into warm milk.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What atoms combine to make up a molecule of water?

1 hydrogen, 2 oxygen

2 hydrogen, 1 oxygen

2 hydrogen, 2 oxygen

Tags

NGSS.MS-PS1-1

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What three fundamental particles are atoms made of?

molecules

protons

electrons

carbon

neutrons

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

a solid to a liquid to a gas

a gas to a liquid to a solid

a liquid to a solid to a gas

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Water and phosphorus with a total mass of 200 grams are added to a flask like the one below and then the flask is stoppered. The flask is then heated up so that a reaction occurs but no gas from the reaction escapes the flask. What mass do you expect to be in the flask after the reaction occurs?

200 grams

less than 200 grams

more than 200 grams

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

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Chemical Reactions & Atomic Structure (Sischo)

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

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

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

What atoms combine to make up a molecule of water?

What three fundamental particles are atoms made of?

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

Water and phosphorus with a total mass of 200 grams are added to a flask like the one below and then the flask is stoppered. The flask is then heated up so that a reaction occurs but no gas from the reaction escapes the flask. What mass do you expect to be in the flask after the reaction occurs?

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

How does the mass of the reactants in an equation compare to the mass of the products?

Use the chart to identify whether a chemical reaction or a physical change occurred between the combined substances.
Solid A & Liquid A - (a)
Solid A & Liquid B - (b)
Solid B & Liquid A - (c)
Liquid A & Liquid B - (d)

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Popular Resources on Wayground

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Chemical Reactions & Atomic Structure (Sischo)

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

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

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

What atoms combine to make up a molecule of water?

What three fundamental particles are atoms made of?

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

Water and phosphorus with a total mass of 200 grams are added to a flask like the one below and then the flask is stoppered. The flask is then heated up so that a reaction occurs but no gas from the reaction escapes the flask. What mass do you expect to be in the flask after the reaction occurs?

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

How does the mass of the reactants in an equation compare to the mass of the products?

Use the chart to identify whether a chemical reaction or a physical change occurred between the combined substances.Solid A & Liquid A - (a) Solid A & Liquid B - (b) Solid B & Liquid A - (c) Liquid A & Liquid B - (d)

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Similar Resources on Wayground

Popular Resources on Wayground

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Use the chart to identify whether a chemical reaction or a physical change occurred between the combined substances.
Solid A & Liquid A - (a)
Solid A & Liquid B - (b)
Solid B & Liquid A - (c)
Liquid A & Liquid B - (d)