Intro to Nuclear Chemistry

Multiple Choice

In a correctly written symbol what would be located in the "A" position?

• number of neutrons

• atomic number

• number of electrons 

• mass number

Multiple Choice

How is the alpha particle written in a nuclear equation?

• ⁴₂He

• ²₄He

• ⁰_-1e

• ⁰₀γ

Multiple Choice

Which type of nuclear radiation is being emitted here?

• Alpha

• beta

• gamma 

• none

Multiple Choice

Solve this equation for alpha decay.
₈₅²⁰⁹At = ___ + ₂⁴He

• ₈₃²⁰⁵Bi

• ₈₆²⁰⁹Rn

• ₈₁²⁰⁷Tl

• ₈₅²⁰⁸At

Multiple Choice

Gamma rays have

• no mass

• a huge mass

• a small mass

• an average mass

Multiple Choice

Solve this equation for beta decay.
₆¹⁴C = ___ + _-1⁰e

• ₄¹⁰Be

• ₇¹⁴N

• ₂¹⁰He

• ₆¹³C

Multiple Choice

During beta-particle emission, a neutron splits into a____________________.

• proton and electron

• neutron and electron

• neutron and proton

Multiple Choice

Has the symbol

• Alpha

• Beta 

• Gamma

Multiple Choice

Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

• Alpha

• Beta

• Gamma

Multiple Choice

Has the lowest penetrating power.  Can only penetrate 0.05 mm into the body and can be stopped by the skin.

• Alpha

• Beta

• Gamma

• Electron capture

Multiple Choice

Uranium-238  decays into  Thorium-234  by emitting .........

• an alpha particle

• a beta particle

• gamma rays

• visible light

Multiple Choice

Radioactive materials have unstable...

• electrons

• protons

• nuclei

• neutrons

Multiple Choice

What happens to the atomic number during alpha decay?

• The atomic number decreases by 4

• The atomic number increases by 1

• The atomic number decreases by 2.

• The atomic number stays the same.

Multiple Choice

Arrange in order of increasing ability to penetrate matter.

• Beta, gamma, alpha

• Alpha, gamma, beta

• Gamma, beta, alpha

• Alpha, beta, gamma

Multiple Choice

In the symbol ¹⁶₇N what the 7 stand for?

• Mass number

• Atomic number

• Atomic mass

• Number of neutrons

Multiple Choice

Which of the following is the correct isotope for the following ion: Protons = 20; Neutrons = 21; Electrons = 18

Multiple Choice

Complete the nuclear equation and determine the type of decay that is occurring in this reaction. 

• alpha

• beta

• gamma

• none

Multiple Choice

Balance the following equation:
¹⁴₆C --> ⁰_-1e + ________

• ¹⁴₅B

• ¹⁴₆C

• ¹⁴₇N

• ⁴₂He

Multiple Choice

The splitting of a nucleus into smaller nuclei is

• fusion

• fission

• decay

• gamma radiation

Multiple Choice

Takes two small nuclei and combines them into a larger nucleus

• Fission

• Fusion

Multiple Choice

This is an example of...

• Fission  reaction

• Fusion reaction

• Decomposition reaction

• Decay

Multiple Choice

The time taken for half of an amount of radioactive atoms to decay.

• Nuclear fusion

• Full-life

• Dead time

• Half-life

Multiple Choice

The technetium-99 isotope has a half-life of 6.0 hours. If 100.0 mg were injected into a patient how much remains after 18 hours?

• 33.0 mg

• 12.5 mg

• .33 mg

• 15.8 mg