Nuclear Physics Introduction

Multiple Choice

Which of the following best describes an electron?

• it has a positive charge smaller than a proton

• it has no charge smaller than a proton

• it has a negative charge smaller than a proton

• it has a negative charge same size as proton

Multiple Choice

Which part of an atom always tells you the identity or name of the element?

• protons

• neutrons

• electrons

• protons and neutrons

Multiple Choice

An atom with atomic number 6 would have how many protons? 

• 6
• 12
• 3
• cannot be determined 

Drag and Drop

This isotope of Titanium has:

​

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protons

22 electrons

​

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neutrons

mass number of ​

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Drag these tiles and drop them in the correct blank above

22

26

48

70

47

21

Drag and Drop

An isotope is an atom of the ​

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element but with a different number of ​

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. This difference causes the ​

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of the atom to change.

Drag these tiles and drop them in the correct blank above

same

neutrons

mass

different

protons

electrons

charge

atomic number

Multiple Choice

Which has the LONGEST wavelength and, therefore, the LOWEST frequency/energy

• Gamma Rays

• Ultraviolet

• Visible Light

• Infrared rays

Multiple Choice

Which of the following statements can be concluded from the table?

• X-Ray waves have a lower frequency than infrared waves.

• Microwaves have a smaller wavelength than visible light.

• The speed of all electromagnetic waves are equal.

• The frequency and wavelengths are equal for each type of radiation.

Multiple Choice

Which of the following are in correct order from greatest to least energy?

• microwaves, infrared, ultraviolet, x-rays

• microwaves, x-rays, infrared, ultraviolet

• x-rays, ultraviolet, infrared, microwaves

• infrared, ultraviolet, x-rays, microwaves

Multiple Choice

When a nucleus undergoes gamma decay, the atomic number of the element....

• remains the same

• decreases by one.

• increases by one.

• increases by two.

Multiple Choice

Radioactive materials have unstable...

• electrons
• protons
• nuclei
• neutrons

Multiple Choice

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle
• beta particle
• gamma ray
• positron

Multiple Choice

Negatively charged particles emitted from a nucleus at a high speed are ____.  

• alpha particle
• gamma rays
• beta particles
• X rays

Multiple Choice

Which type of nuclear radiation is being emitted here?

• Alpha

• beta

• gamma

• none

Multiple Choice

In order of most to least penetrating radiation we have

• Alpha , Beta,  Gamma
• Beta , Gamma , Alpha
• Gamma, Beta, Alpha
• Gamma, Alpha, Beta

Multiple Choice

Radiometric dating is possible because the rates of decay of radioactive isotopes _____.

• change over time
• change from place to place
• are constant
• vary widely

Multiple Choice

The time it takes for 50% of the nuclei in a radioactive sample to decay to its stable isotope is called _____.

• the daughter product
• geologic time
• the half-life
• the half-time

Multiple Choice

The graph shows the radioactive decay of a 50-gram sample of a radioactive isotope. 
According to the graph, what is the half-life of this isotope? 

• 100 years
• 150 years
• 200 years
• 300 years

Multiple Choice

What process describes two small nuclei combining into a larger nucleus?

• fission

• fusion

• alpha decay

• beta decay

Multiple Choice

What process is described by the splitting of a nucleus into smaller nuclei?

• fusion

• fission

• half-life

• gamma radiation

Multiple Choice

What nuclear process is shown in the picture?

• alpha decay

• gamma emission

• fusion

• fission

Multiple Choice

Which nuclear process if shown in the picture?

• alpha decay

• beta decay

• fusion

• fission