Test 2 Review (Nuclear Chemistry Part 2, Bohr Model)

Which type of radiation has the greatest penetrating power?

• Alpha
• Beta
• Gamma 
• Microwaves

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

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

Tags

NGSS.HS-PS1-8

When nuclei decay, massive amounts of __________ is released.

• energy

• Protons

• neutrons

Tags

NGSS.HS-PS1-8

TRUE or FALSE: gamma changes the atomic number.

• True
• False

Which is not true of radioactive decay?

• It is a result of instability in atoms
• It happens only in nuclear power plants
• Radioactivity can be useful
• It is hazardous to human health

 The three types of nuclear radiation in increasing order of penetrating power are ____.

• gamma, beta, alpha
• alpha, gamma, beta
• alpha, beta, gamma
• beta, gamma, alpha

Tags

NGSS.HS-PS1-8

Which radiation has no electric charge associated with it?

• alpha
• beta
• gamma
• alpha and beta

Thorium-234 has a half-life of 24 days. If you started with a 100-g sample of thorium-234, how much would remain after 48 days?

• 100 g
• 50 g
• 25 g
• 10 g

Tags

NGSS.HS-PS1-8

What particle completes this reaction?

• alpha particle
• beta particle
• gamma particle
• neutron

Tags

NGSS.HS-PS1-8