Radioactivity Practice Test

Which of the following is NOT a correct definition for isotope?

• An atom that has an uncommon number of neutrons

• An atom that has more or less mass than what's listed on the Periodic Table

• An atom with an unstable nucleus

• An atom that has too many electrons

Tags

NGSS.HS-PS1-8

Which of the following is NOT an isotope?

• A phosphorous atom with 17 neutrons

• A phosphorous atom with a mass of 32

• A phosphorous atom with 15 protons

• A phosphorous atom that is unstable

Tags

NGSS.HS-PS1-8

Which of the elements below is NOT an isotope?

• Chlorine-37

• Sodium-23

• Hydrogen-3

• Calcium-42

Tags

NGSS.HS-PS1-8

Which of the 3 types of radioactive decay only emits a wave of energy?

• Alpha

• Beta

• Gamma

• Omicron

Tags

NGSS.HS-PS1-8

NGSS.HS-PS4-3

According to the image, the middle radiation type (B) cannot penetrate through lead. Which type of radiation is this?

• Alpha

• Beta

• Gamma

• Pi

Tags

NGSS.HS-PS4-4

According to the image, radiation C travels further than radiation types A and B. Why?

• Radiation C emits electrons, which are the lightest of all particles, so they travel far.

• Radiation C emits protons and neutrons, which are the lightest particles, so they travel far

• Radiation C emits energy which is lighter than all particles, so it travels far

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

What happens to the mass of an atom when it undergoes gamma decay?

• The mass increases

• The mass decreases

• The mass stays the same

• The mass decreases in half

Tags

NGSS.HS-PS1-8

A radioactive isotope has a half-life of 2 years. At the end of 4 years, how much of a 300 gram sample will remain?

• 300 grams

• 150 grams

• 75 grams

• 37.5 grams

Tags

NGSS.HS-PS1-8

     The half-life of Cobalt-60 is 5.272 years.  How much of a 160 gram sample remains after 10.544 years?

• 160 grams

• 40 grams

• 80 grams

• 20 grams

Tags

NGSS.HS-PS1-8

Which of the following is the correct definition of half-life?

• The time required for a radioactive sample to completely decay

• Half of the time required for a radioactive sample to completely decay

• The time required for half of a radioactive sample to decay

Tags

NGSS.HS-PS1-8