Nuclear Rxn

At times, lost mass is converted into _________, during fission reactions.

• chain reactions

• energy

• critical mass

• fusion

Tags

NGSS.HS-PS1-8

This type of reaction occurs when light nuclei combine to form a larger, single nucleus.

• Fission
• Fusion
• single displacement
• double displacement

Tags

NGSS.HS-PS1-8

This type of  reaction occurs when a heavy nucleus, such as U-235, splits into two or more parts.

• Fission
• Fusion
• Chain reaction
• synthesis

Tags

NGSS.HS-PS1-8

Energy given off by the sun and other stars comes from nuclear ________________.

• Fusion

• Fission

Tags

NGSS.HS-ESS1-1

Identify elements A and B and the process, C, in the illustration below.

• Deuterium, Tritium, Nuclear Fusion
• Deuterium, Tritium, Nuclear Fission
• Tritium, Hydrogen, Nuclear Fusion
• Deuterium, Hydrogen, Nuclear Fission

Tags

NGSS.HS-PS1-8

Two reactions occur that do not obey the Law of Conservation of Mass. The first reaction involves light elements forming heavier ones. The second reaction has heavy elements forming lighter ones. Which statement describes these reactions?

• Both reactions may be nuclear fusion
• Both reactions may be nuclear fission
• The first reaction is nuclear fusion, and the second is nuclear fission
• The first reaction is nuclear fission, and the second is nuclear fusion

Tags

NGSS.HS-PS1-8

A nuclear fission reaction occurs when a uranium-235  atom is bombarded with a neutron. This reaction is used to produce energy in a nuclear power plant. Why is it not possible to carry out a nuclear fusion reaction in a nuclear reactor?

• A fusion reaction releases harmful rays
• A fusion reaction is difficult to control
• A fusion reaction requires extremely low temperature and pressure
• A fusion reaction requires extremely high temperature and pressure

Tags

NGSS.HS-PS1-8

In nuclear fusion, two positively charged nuclei must touch and bind together. This requires that the nuclei approach each other at.....

• low temperatures and low velocity
• low temperatures and high velocity
• high temperatures and high velocity
• high temperatures and low velocity

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Which of the following statements BEST describes nuclear fission?

• Nuclear fission inside stars can absorb or release energy
• Nuclear fission causes the reaction inside an atomic bomb
• Nuclear fission is usually present in endothermic reactions
• Nuclear fission cannot be used to produce power in nuclear energy plants

Tags

NGSS.HS-PS1-8

The half life of iodine-131 is 8.040 days. What percentage of an iodine-131 sample will remain after 40.20 days?

• 312.5%
• 31.25%
• .3125%
• 3.125%