Term 1 Review

Which of the following is an intensive (intrinsic) property?

• density

• mass

• length

• volume

An example of an extensive property of matter is

• boiling point

• temperature

• density

• mass

Which of the following is a chemical property?

• Water boils at 100^oC.

• Mercury is a liquid at room temperature.

• Lithium reacts with water.

• Oxygen exists as a molecule with two atoms.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a physical property of water?

• Water reacts with magnesium.

• Hydrogen and oxygen react to produce water in a synthesis reaction.

• Water melts below room temperature.

• Water can be decomposed using electrolysis.

Which is the atomic number for selenium?

• 74.92

• Se

• Selenium

• 34

The total number of protons and neutrons in an atom is

• always found on the periodic table.

• the mass number.

• the atomic number.

• not something we can know.

What do these two symbols represent? Choose all that apply.

• an atom with 12 or 13 protons

• two atoms that are the same

• isotopes of carbon

• atoms of carbon with different numbers of neutrons

Tags

NGSS.MS-PS1-1

All atoms of the same element have the same

• mass

• mass number

• number of neutrons

• number of protons

What does the number in chlorine-35 represent?

• mass number

• nucleus number

• atomic number

• average atomic mass

Which of the following is the best explanation for the difference between a gas and a vapor?

• There is no significant difference. They are basically the same.

• A vapor is water in its gaseous state, but a gas is any other gas.

• Vapors are produced when substances are burned, but gases are substances that have been evaporated.

• A vapor is a liquid or solid at room temperature but has been heated to a gaseous state, but a gas is in the gaseous state at room temperature.

Tags

NGSS.MS-PS1-4