Radioactivity

Which particles are contained in the nucleus?

• Protons + Photons

• Protons + Neutrons

• Neutrons + Zutrons

• Electrons + Protons

Tags

NGSS.HS-PS1-8

How many protons are in this atom?

• 0

• 6

• 12

• 18

Tags

NGSS.HS-PS1-8

Atoms with the same number of protons, but different numbers of neutrons, are called...

• Isotopes

• Ions

• Atoms

• Nucleons

Tags

NGSS.MS-PS1-1

What type of decay is shown here?

• Alpha

• Beta

• Gamma

• Photon

Tags

NGSS.HS-PS1-8

What is the missing number?

• 90

• 92

• 94

• 96

Tags

NGSS.HS-PS1-8

What are the missing two numbers?

• 238

  92

• 238

  90

• 234

  92

• 234

  90

Tags

NGSS.HS-PS1-8

A radioactive source has an activity of 120, and a half-life of 2 years. What will its activity be in 6 years?

• 0

• 15

• 30

• 60

Tags

NGSS.HS-PS1-8

A source has an activity of 200. Over a period of 8 days, it drops to an activity of 50. What is its half-life?

• 8 days

• 6 days

• 4 days

• 2 days

Tags

NGSS.HS-PS1-8

What is the half-life of the isotope in this graph?

• 140 days

• 200 days

• 380 days

• 400 days

Tags

NGSS.HS-PS1-8

A source with half-life of 10 minutes has a count rate of 240 Bq. What will the count rate be after 40 minutes?

• 15

• 30

• 60

• 120