Chapter 20 Nuclear Chemistry

Multiple Choice

_____is the joining of atomic nuclei

• Fusion

• chain reaction

• Photosynthesis

• Fission

Multiple Choice

_______is the splitting of atomic nuclei

• Fission

• nuclear reaction

• Fusion

• bayler reaction

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

Radioactive materials have unstable...

• electrons
• protons
• nuclei
• neutrons

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

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 electrons 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

Multiple Choice

What is the half-life of iodine-131?

• 32 days
• 8 days
• 16 days
• 24 days