half life

An element's half-life is a measure of radioactive decay

• True

• False

Tags

NGSS.HS-PS1-8

What is an isotope? (pick 2 answers)

• element with different # of neutrons

• element with different # of electrons

• element with different atomic mass

• element with different # of protons

Tags

NGSS.MS-PS1-1

Only some isotopes have half-lives

• True

• False

Tags

NGSS.HS-PS1-8

How many half-lives have passed if 50% of parent isotope remains?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-8

How many half-lives have passed if 6.25% of original product remains?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-8

The time it takes for a half-life of Carbon-14 to pass is always the same

• True

• False

Tags

NGSS.HS-PS1-8

How many half-lives have passed if 12.5% of original isotope remains?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-8