Half Life and Radioactivity

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

• quarter life

• whole life

• wonderful life 

• half life

Tags

NGSS.HS-PS1-8

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

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

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

The half life of a radioactive substance:

• increases with time
• increases then decreases with time
• decreases with time
• stays the same with time

Tags

NGSS.HS-PS1-8

A helium nucleus with two protons and two neutrons is called a(n) ____ particle

• alpha
• beta
• gamma
• lambda

Tags

NGSS.HS-PS1-8

The amount of material left after TWO half lives is ____ of the original amount.

• 1/2
• 1/4
• 1/8 
• 1/16

Tags

NGSS.HS-PS1-8

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

How many neutrons does uranium-235 have?

• 238
• 92
• 146
• 143

Tags

NGSS.HS-PS1-8