An alpha particle is another name for a(n)
a. electron
b. proton
c. neutron
d. helium nucleus
e. photon
[Ques. 2] If someone tells you they have a sample of niobium-90, can you tell how many neutrons are in the nucleus?
a. Yes, there are 41 neutrons.
b. Yes, there are 90 neutrons.
c. Yes, there are 49 neutrons.
d. No, more information must be given.
e. No, there is no such thing as niobium..
[Ques. 3] What does the 235 represent in uranium-235?
a. the mass number c. the neutron number
b. the atomic number d. none of the above
[Ques. 4] The expression(s) indicating the number of protons in a nucleus is
a. A
b. N
c. Z
d. Z + N
e. A Z
[Ques. 5] The expression(s) indicating the atomic number of a nucleus is
a. A
b. N
c. Z
d. Z + N
e. A Z
[Ques. 6] What holds the nucleus together?
a. electrical forces between the protons
b. alpha particles
c. beta particles
d. strong forces
[Ques. 7] How big is the nucleus of an atom?
a. about 1 of the volume of the whole atom
b. about a millionth of the volume of the whole atom
c. about a billionth of the volume of the whole atom
d. about a trillionth of the volume of the whole atom
[Ques. 8] Two isotopes have the same
a. mass number
b. neutron number
c. atomic number
d. quantum number
e. none of the above
[Ques. 9] The number of protons in a nucleus is the
a. mass number
b. neutron number
c. atomic number
d. isotope number
e. none of the above
[Ques. 10] What's an isotope?
a. a radioactive material
b. an atom of an element with a different number of neutrons in the nucleus
c. an electrically charged atom
d. none of the above
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