Radioactive Isotopes

The Half Life of Californium 252 is 5 years.

• TRUE

• FALSE

Tags

NGSS.HS-PS1-8

The term given to unstable radioactive atoms.

• Parent

• Daughter

• Half Life

• Igneous

Tags

NGSS.HS-PS1-8

The % of the parent isotope remaining after 1 Half Life.

• 50%

• 25%

• 12.5%

• 6.25%

Tags

NGSS.HS-PS1-8

The % of the parent isotope remaining after 2 Half Lives.

• 50%

• 25%

• 12.5%

• 6.25%

Tags

NGSS.HS-PS1-8

After one half life, a sample will begin to have more of the parent isotope than the daughter isotope.

• TRUE

• FALSE

Tags

NGSS.HS-PS1-8

The diagram shows 32 atoms

32 of the Red are the parent isotope

0 of the atoms are daughter isotopes

How many half-lives have occurred?

• 0

• 1

• 2

• 3

Tags

NGSS.HS-PS1-8

What is the half-life of iodine-131?

• 32 days

• 8 days

• 16 days

• 24 days

Tags

NGSS.HS-PS1-8

What is the half life of Carbon-14?

• 5730 yrs

• 1.2 billion years

• 713 million years

• 1.3 billion years

Tags

NGSS.HS-PS1-8

Some ELEMENTS can decay over time.

• True

• False

Tags

NGSS.HS-PS1-8

An element that has broken down and released particles and energy is said to be _______________.

• radioactive

• subatomic

Tags

NGSS.HS-PS1-8