Nuclear Physics

What is Radioactive ?

• A nucleus that is surrounded by electrons

• A material that spontaneously decays and give off the nuclear particles

• When one element is transform into a different element

• The time required for half the atoms in a given quantity of radioactive isotope to decay

Which type of nuclear radiation is being emitted here?

• Alpha
• beta
• gamma 
• none

What shield beta radiation?

• lead

• paper

• concrete

• metal foil

What type of reaction occurs in the sun?

• Fission

• Fusion

• alpha decay

• beta decay

What is half-life?

• The amount of time it takes for some of the nuclei in a sample of the isotope to decay

• The amount of time it takes for half the electron in a sample of the isotope to decay

• The amount of time it takes for half the nuclei in a sample of the isotope to decay

• The amount of time it takes to double the nuclei in a sample of the isotope to decay

This nuclear process involve a neutron bombarding a giant, unstable atom

• Fusion

• Fission

• Alpha decay

• Beta decay

Least penetrating radiation

• alpha radiation

• beta plus

• gamma radiation

• neutron

Nuclear fission can be happen in nuclear reactor. Which component is matched with the correct function?

• Concrete wall - To slow down the fast moving neutron

• Control rod - Fission reaction occurs in the rod to produce heat energy

• Uranium rod - To prevent the escape of harmful radiation

• Water - Absorb heat from chain reaction

Gamma rays have the ______ wavelength, and the ______ frequency

• shortest ; highest

• longest ; lowest

• shortest ; lowest

• highest ; shortest