Radioactivity Review

After the third half-life, how much of the sample is left?

• 1/2
• 1/3
• 1/16
• 1/8

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NGSS.HS-PS1-8

If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

• 1.25mg
• 1.25g
• 10g
• 10mg

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NGSS.HS-PS1-8

The diagram shows 32 atoms.

16 of the Red are parent isotopes

16 of the Green are daughter isotopes

How many half-lives have occurred?

• 0

• 1

• 2

• 3

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NGSS.HS-PS1-8

What type of decay is being illustrated in following picture? 

• beta decay
• alpha decay 

Tags

NGSS.HS-PS1-8

When nuclei decay, massive amounts of __________ is released.

• energy
• jello
• protons
• neutrons

Tags

NGSS.HS-PS1-8

The diagram shows 32 atoms

32 of the Red are the parent isotope

0 of the atoms are daughter isotopes

How many half-lives have occurred?

• 0

• 1

• 2

• 3

Tags

NGSS.HS-PS1-8

A bone sample contains only 1/4 of its original radioactive C¹⁴ content. How old is the bone sample?

• 1 C¹⁴ half-life

• 2 C¹⁴ half-lives

• 3 C¹⁴ half-lives

• 4 C¹⁴ half-lives

Tags

NGSS.HS-PS1-8

What is the Half life of this isotope?

• 5 seconds

• 10 seconds

• 15 seconds

• 20 seconds

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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

What particle completes this reaction?

• alpha particle
• beta particle
• gamma particle
• neutron

Tags

NGSS.HS-PS1-8