Radioactivity

The rate at which a radioactive element decays is its ____.

• quarter life
• whole life
• wonderful life 
• half life

Tags

NGSS.HS-PS1-8

Energy in the sun is produced as a result of nuclear ____ reactions.

• fusion
• fission
• waste
• sub

Tags

NGSS.HS-ESS1-1

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

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

The process by which nuclei having small masses are combined to form a single larger nucleus is called nuclear ____.

• fusion

• fission

• reactivity

• waste

Tags

NGSS.HS-PS1-8

Name the type of radioactive particle that can be stopped by a sheet of paper.

• alpha
• beta
• gamma
• lambda

Name the most penetrating type of radiation.

• alpha
• beta
• gamma
• lambda

What makes something radioactive?

• elements with an atomic number above 81
• an unstable nucleus
• contaminated sewage
• It decays over time

Tags

NGSS.HS-PS1-8

If the half life of a radioactive element is 100yrs, how long would it take for the radioactivity to reduce by one half?

• 200yrs
• 100yrs
• 50yrs
• 300yrs

What is nuclear fission?

• Big nucleus splits to small nuclei
• Small nuclei fuse into a bigger nucleus
• Stars
• Making compounds

Tags

NGSS.HS-PS1-8

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

• 0.25g
• 2.5g
• 25g
• 80g