Chapter 5: Matter and Atoms

____ is another name for a homogeneous mixture.

• Liquid
• Solution
• Substance
• Suspension

When two or more substances are combined so each substance can be separated by physical means, the result is a(n)____.

• chemical change
• compound
• element
• mixture

Which of the following is a small particle that is the building block of matter?

• substance
• mixture
• atom
• molecule

Which of the following is NOT a molecule?

• water
• gold
• carbon dioxide
• sugar

Which of the following can NOT be used to separate heterogeneous mixtures?

• a strainer
• a magnet
• a scoop
• stove

What is matter?

• anything that you can see, hear or feel
• anything with mass that takes up space
• anything that can be burned
• anything that exists

Which describes the composition of a substance?

• it is always the same
• it is not always the same
• it contains only one type of element
• it contains more than one type of element

Two atoms of the same element can differ in which of the following?

• the number of protons, neutrons, or electrons
• only in the number of protons or electrons
• only in the number of protons or neutrons
• only in the number of neutrons or electrons

What is true of all neutral atoms?

• they have equal numbers of neutrons and electrons
• they have equal numbers of protons and neutrons
• they have equal numbers of protons and electrons
• they have equal numbers of protons, neutrons and electrons

An element's atomic number is the number of __________ in the nucleus of each atom of that element.

• neutrons
• protons
• electrons
• positrons