Unit 1 Test: Elements, Compounds, and Solutions (ALL QUESTIONS)

Recall the bath fizzy that bubbled in warm water at the beginning of the chapter. One main ingredient of a bath fizzy is baking soda, NaHCO₃. What elements make up this compound?

• Nitrogen, Hydrogen, Cobalt

• Sodium, Hydrogen, Cobalt

• Nitrogen, Hydrogen, Carbon, Oxygen

• Sodium, Hydrogen, Carbon, Oxygen

Tags

NGSS.MS-PS1-1

All substances are made of two or more types of elements.

• True

• False

Tags

NGSS.MS-PS1-1

Use the periodic table to identify the atoms in the chemical formula AgNO₃ as well as the number of each kind of atom.

• 1 Silver, 1 Nitrogen, 1 Oxygen

• 1 Silver, 1 Nitrogen, 3 Oxygen

• 1 Silver, 3 Nitrogen, 3 Oxygen

• 3 Silver, 3 Nitrogen, 3 Oxygen

Tags

NGSS.MS-PS1-1

Which is an example of an element?

• air

• water

• sodium

• Sugar

How many compounds, elements, and atoms are present in magnesium hydroxide, Mg(OH)₂?

• 1 compound, 3 elements, and 5 atoms

• 2 compounds, 3 elements, and 6 atoms

• 1 compound, 2 elements, and 5 atoms

• 2 compounds, 3 elements, and 5 atoms

Tags

NGSS.MS-PS1-1

While on a hike in a forest, you observe the following changes as described in Table 1. Which change would be classified as a chemical change?

• Change 1

• Change 2

• Change 3

• Change 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement supports the claim that combining sodium and chlorine to make salt is a chemical change?

• Salt has the same chemical and physical properties as chlorine.

• Salt has the same chemical and physical properties as sodium.

• Sodium and chlorine have different chemical and physical properties.

• Salt has different chemical properties than sodium and chlorine.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The model shows the change that occurs when two substances are mixed. How would this change be classified?

• As a chemical change because a new substance is formed.

• As a chemical change because a new substance is not formed.

• As a physical change because a new substance is formed.

• As a physical change because a new substance is not formed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Recall the bath fizzy that bubbled in warm water at the beginning of the chapter. The solute in the aqueous solution is ______ and the solvent is ______.

• the bath bomb; water

• water; the bath bomb

• the bath bomb; salt

• salt; water

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

If more solvent is added to an aqueous solution, what happens to the concentration?

• The volume decreases, the amount of solute remains the same, and the concentration decreases.

• The volume increases, the amount of solute remains the same, and the concentration decreases.

• The volume increases, the amount of solute increases, and the concentration increases.

• The volume decreases, the amount of solute increases, and the concentration increases.