Nuclear Chemistry

Which process involves the joining of small nuclei to produce larger elements and release energy?

• Beta decay

• Alpha decay

• Nuclear fission

• Nuclear fusion

Which process involves the splitting of large nuclei to release smaller neutrons, energy, and neutrons?

• Beta decay

• Alpha decay

• Nuclear fission

• Nuclear fusion

The time taken for half of an amount of radioactive atoms to decay.

• Nuclear fusion
• Full-life
• Dead time
• Half-life

Tags

NGSS.HS-PS1-8

Scientist involved with discovery of radioactivity and the discovery of new elements?

• Albert Einstein

• Ernest Rutherford

• Marie Curie

• Isaac Newton

Arrange in order of increasing ability to penetrate matter.

• Beta, gamma, alpha

• Alpha, gamma, beta

• Gamma, beta, alpha

• Alpha, beta, gamma

The technetium-99 isotope has a half-life of 6.0 hours. If 100.0 mg were injected into a patient how much remains after 18 hours?

• 33.0 mg
• 12.5 mg
• .33 mg
• 15.8 mg

Tags

NGSS.HS-PS1-8

What happens to the atomic number (number of protons) during alpha decay?

• The atomic number decreases by 4

• The atomic number increases by 1

• The atomic number decreases by 2.

• The atomic number stays the same.

Balance the following equation:
¹⁴₆C --> ⁰_-1e + ________

• ¹⁴₅B
• ¹⁴₆C
• ¹⁴₇N
• ⁴₂He

Tags

NGSS.HS-PS1-8

The half life of Thorium-234 is 24 days. What fraction of the element remains after 96 days

• 1/2
• 1/4
• 1/8
• 1/16

Tags

NGSS.HS-PS1-8

What do these symbols represent?

• alpha particle
• beta particle
• neutron
• gamma ray

Tags

NGSS.HS-PS1-8