Physical Science Final Exam Study Guide

This is an example of...

• Fission  reaction
• Fusion reaction
• Decomposition reaction
• Combustion

In which type of reaction do two lighter nuclei combine to form one heavier nucleus?

• combustion

• oxidation

• nuclear fission

• nuclear fusion

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

If 10 mg of iodine 131 is given to a patient, how much is left after 27 days? The half-life of iodine-131 is 9 days.

• 5.0mg

• 2.5mg

• 1.25mg

• 10mg

What is the half life of californium?

• 1 year

• 2.8 years

• 3 years

• 5 years

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 4.8 minutes has elapsed?

• 100.0g

• 25.0g

• 12.5g

• 8.5g

If 10 mg of iodine 131 is given to a patient, how much is left after 8 days? The half-life of iodine-131 is 8 days.

• 5.0mg

• 1.25g

• 10g

• 10mg

What is an advantage  of nuclear energy?

• radioactive waste
• no air pollution
• we will never run out
• it is the safest way to make energy

What is the main function of a nuclear reactor?

• to convert heat energy into nuclear energy

• to convert light energy into nuclear energy

• o convert nuclear energy into light energy

• to convert nuclear energy into heat energy

What is the formula to calculate speed?

• Speed = time/distance
• Speed = distance/time
• Speed = distance x time
• Speed = time x distance