1. Which is a compound?

• lithium
• glucose
• oxygen
• air

Tags

NGSS.MS-PS1-1

2. Which is classified as an element?

• gold
• carbon monoxide
• baking soda
• water

Tags

NGSS.HS-PS1-1

3. This table provides information about some group 17 elements. Which is the best estimate of the boiling point of Iodine(I)?

• -90 °C
• 15 °C
• 185 °C
• 410 °C

Tags

NGSS.HS-PS1-1

4. Which best describes the sequence of the elements in Period 3 of the periodic table?

• highly reactive metals, transition metals, metalloids, reactive nonmetals, nonreactive gases
• highly reactive metals, metalloids, reactive nonmetals, nonreactive gases
• nonreactive gases, metalloids, nonreactive metals, highly reactive metals, highly reactive gases
• nonreactive gases, nonreactive metals, highly reactive metals, metalloids, reactive nonmetals, reactive gases

Tags

NGSS.HS-PS1-1

5. Bromine has 7 valence electrons. With what group of elements will bromine most readily bond?

• group 1
• group 2
• group 16
• group 18

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

6. Iron filings are weighed and left in a humid room for one year. They appear rusty and when weighed again it is found that they have become slightly heavier. Which best explains this observation?

• Some atoms in the air have combined with the iron, adding weight to the iron filings.
• Some new iron atoms were created.
• Some of the iron atoms became heavier.
• Some of the atoms during the reaction changed to a different kind of atoms.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

7. Which is the best example of a chemical change?

• ice melting
• bread toasting
• glass shattering
• dry ice sublimating

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

8. The chemical reaction for the double displacement reaction of sodium carbonate with silver nitrate to yield sodium nitrate and silver carbonate is shown below. How does the reaction support the Law of Conservation of Mass?

• Two molecules of silver nitrate are created.
• The mass of sodium atoms is reduced during the reaction but the mass of silver atoms increases by the same amount to keep the total mass the same.
• The number of atoms in the reactants equals the number of atoms in the products.
• The mass of oxygen atoms is the only thing that remains the same before and after the reaction.

Tags

NGSS.HS-PS1-7

9. Which statement is true about a chemical reaction?

• If the reactants are all liquids, the products must all be liquids.
• Some of the atoms in the reactants may be lost to the air in an open container and will not be part of the products.
• All of the atoms in the products can be found in the reactants.
• If there are two different reactants, there will always be two different products after a chemical reaction takes place.

Tags

NGSS.HS-PS1-7

10. Which chemical equation best follows the Law of Conservation of Mass?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-7