Chemistry: Isotopes

Test Quiz

Questions on this quiz are based on information from
Chemistry: Isotopes.

1. What particle determines the atomic number of an atom?
a. Neutron
b. Quark
c. Element
d. Proton
e. Nucleus

2. Atoms always have the same number of what two atomic particles?
a. Neutrons and neutrinos
b. Neutrons and protons
c. Electrons and protons
d. Electrons and quarks
e. Quarks and protons

3. The number of what atomic particle varies between different isotopes of the same element?
a. Neutron
b. Quark
c. Element
d. Proton
e. Nucleus

4. What characteristic of an element differs between isotopes?
a. Negative charge
b. Mass
c. Positive charge
d. Chemistry
e. All of the Above

5. In the isotope Carbon-14, what does the number 14 represent?
a. The total charge
b. The number of electrons
c. Mass of the atom
d. All of the above
e. None of the Above

6. What is the name given to the element hydrogen when it has no neutrons?
a. Protium
b. Deuterium
c. Tritium
d. This isotope does not exist

7. True or False: Most elements only have 1 or 2 isotopes and several elements do not have any isotopes.

8. Which of the following is true about unstable isotopes?
a. They decay over time
b. They can turn into another isotope
c. They can turn into another element
d. They are radioactive
e. All of the Above

9. What element has the most stable isotopes?
a. Iron
b. Hydrogen
c. Oxygen
d. Tin
e. Carbon

10. What is the nickname for water made with the Hydrogen isotope deuterium?
a. Hard water
b. Purified water
c. Heavy water
d. Soft Water
e. Isotropic water

About this quiz: All the questions on this quiz are based on information that can be found on the Chemistry: Isotopes page at

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