Chapter 6 Test 3. Which of the following is a small particle that is the building block of matter?
a substance
b. mixture
c. atom
d. molecule
4. Which of the following is NOT a molecule?
a. water
b. silver
c. carbon dioxide
d. sugar
5. Which particle or particles make up the nucleus?
a. protons
b. neutrons
c. clectrons and protons
d. protons and neutrons
6. The number of protons in the nucleus of an atom is which of the following?
a. atomic number
b. electron cloud
c. isotope
d. ion
7. What is an ion?