Test On Chapter 25 Nuclear Chemistry
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- 1.How does an unstable nuclues release energy?
- A.
By emitting raduation before radioactive decay
- B.
By emitting raduation after radioactive decay
- C.
By emitting raduation during radioactive decay
- D.
By emitting raduation in between radioactive decay
- 2.What are the three main types of nucear radiation?
- A.
Alpha , beta , gamma
- B.
Fusion, fission , fassion
- C.
Half life, radioisotope, scuntillation
- D.
Transmutation, transuranium, geiger
- 3.What part of an atom undergoes change during radioactive decay?
- A.
Neutron
- B.
Electron
- C.
Proton
- D.
Nucleus
- 4.How is an atomic number of a nucleus changed by alpha decay?
- A.
The atomic number decreases by two
- B.
The atomic number decreases by one
- C.
The atomic number decreases by three
- D.
The atomic number decreases by zero
- 5.How is the atomic number of a nucleus changed by beta decay?
- A.
The atomic number increases by threee
- B.
The atomic number increases by two
- C.
The atomic number increases by one
- D.
The atomic number increases by zero
- 6.How is the atomic number of a nucleus changed by gamma decay?
- A.
The emission of gamma radiation changes the atomic number by two.
- B.
The emission of gamma radiation changes the atomic number by one.
- C.
The emission of gamma radiation does change the atomic number.
- D.
The emission of gamma radiation does not change the atomic number.
- 7.How is the atomic mass number of a nucleus changed by alpha decay?
- A.
Mass number decreases by two
- B.
Mass number decreases by four
- C.
Mass number increases by four
- D.
Mass number increases by two
- 8.How is the atomic mass of a nucleus changed by beta decay?
- A.
The mass number changes by one
- B.
The mass number will change
- C.
The mass number will change by two
- D.
The mass number does not change
- 9.How is the atomic mass number of the nucleus changed by gamma delay?
- A.
The emission of gamma radiation does change the mass number.
- B.
The emission of gamma radiation does not change the mass number.
- C.
The emission of gamma radiation increases the mass number by two.
- D.
The emission of gamma radiation decreases the mass number.
- 10.Which of the three kinds of radiation described in this section in the most penetrating?
- A.
Alpha radiation
- B.
Gamma radiation
- C.
Beta radiation
- 11.Atomic numbers _________________.
- A.
Not charged
- B.
Repell
- C.
Charge
- D.
Balanced
- 12.Mass numbers must be __________________.
- A.
Charged
- B.
Unbalanced
- C.
Repell
- D.
Balanced
- 13.What particles in an atom are involved in chemical reactions?
- A.
Nuclei electron
- B.
Valence electrons
- C.
Nuclear nucleus
- D.
Radioisotopes
- 14.What element was named in honor of the Curies and is it radioactive ?
- A.
Curium, yes
- B.
Carbon, yes
- C.
Radium, yes
- D.
Uranium,yes
- 15.______________involves the transfer or sharing of elcetrons;the nuclei remains unchanged
- A.
Nuclear reactions
- B.
Chemical reactions
- 16.___________ involves changes in the nuclei of the atoms.
- A.
Chemical reactions
- B.
Nuclear reactions
- 17.What is radiation?
- A.
The penetrating rays and positive particles emitted by a radioactive source.
- B.
The penetrating rays and particles emitted by a radioactive source.
- C.
The non-penetrating rays and particles emitted by a radioactive source.
- D.
The penetrating rays and particles emitted by a non-radioactive source.
- 18._________________ worked with Marie and Pierrie to study the ability of uranium salts that had been exposed to sunlight to fog photographic film plates.
- A.
Megana
- B.
March
- C.
Granger
- D.
Becquerel
- 19.What makes a nucleus unstable?
- A.
It has too many or too few neutrons relative to the number of electrons.
- B.
It has too many or too few neutrons relative to the number of protons.
- C.
It has too many or too few neutrons relative to the number of neutrons.
- 20.Which kind of particle would need to be emitted to balance the equation?
- A.
Positron
- B.
Neutron
- C.
Electron
- D.
Proton
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