📘 Mon Oct 26 ONSITE ONLY Decay Chain/Half-life Quiz

The name given to the several steps required to get a radioactive element to a stable element.

• decay chain

• alpha decay

• beta decay

• radiation

What type of decay is missing at the circled point ?

• alpha

• beta

• gamma

• can't tell without more information

Tags

NGSS.HS-PS1-8

What does Plutonium - 239 decay into at the circled point?

• Thorium - 231

• Uranium - 235

• Thorium -232

• Uranium - 234

Tags

NGSS.HS-PS1-8

What does Plutonium - 239 decay into at the circled point?

• Actinium - 227

• Actinium - 225

• Radon - 227

• Radium - 224

Tags

NGSS.HS-PS1-8

Thorium-230 decays into _____ via _____ emissions.

• radium-88; alpha

• radium-226; beta

• polonium-218; alpha

• radium-226; alpha

Lead-214 decays into _____ via _____ emissions.

• bismuth-214; alpha

• bismuth-214; beta

• bismuth-83; beta

• bismuth-210; alpha

If you start out with 100 grams of a radioisotope, how much remains after 2 half-lives?

• 100 grams
• 75 grams
• 50 grams
• 25 grams

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

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

• 1/2
• 1/3
• 1/16
• 1/8

Tags

NGSS.HS-PS1-8

Chromium 48 decays, after 6 have lives what’s fraction of the original nuclei would remain

• 1/64

• 1/32

• 1/128

• 1/96