Nuclear Chemistry

What is emitted during Gamma Radiation?

• Particles.
• Pizza.
• Beta Rays.
• Gamma Rays.

An energized electron resulting from the breaking apart of a neutron in an atom.

• Alpha
• Beta
• Gamma

What is not a characteristic of a Beta particle?

• Stopped by thin metal
• The most dangerous type of radiation
• High speed, High energy electrons or positrons
• can penetrate skin

Tags

NGSS.HS-PS1-8

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 the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

• 1 half-life
• 2 half-lives
• 3 half-lives
• 4 half-lives

What percent of carbon-14 would be left after 5730 years?

• 100%
• 75%
• 50%
• 25%

What percent of carbon-14 would be left after 11,460 years?

• 100%
• 75%
• 50%
• 25%

What is the half-life of iodine-131?

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

Takes two small nuclei and combines them into a larger nucleus

• fission
• fusion

Tags

NGSS.HS-PS1-8

NGSS.HS-ESS1-1

The splitting of a nucleus into smaller nuclei is

• fusion
• fission
• half-life
• gamma radiation

Tags

NGSS.HS-PS1-8