Ch 10 Quiz Review

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been two half-lives?

• 25 years
• 200 years
• 400 years
• 800 years

Tags

CCSS.HSF.LE.A.4

The graph shows the generalized rate of decay of radioactive isotopes over 5 half-lives. 
If the original mass of a radioactive isotope was 24 grams, how many grams would remain after 3 half-lives? 

• 12
• 24
• 3
• 6

Which type of radiation is the strongest and most harmful?

• alpha

• beta

• gamma

Which type of radiation is the weakest/least harmful?

• alpha

• beta

• gamma

What is a half life?

• the amount of time required for one half of a radioactive substance to decay

• about 45 years

• half of your life

• radioactivity

what is a half-life?

• the rate of decay for an alpha particle.

• the time required for one half of a sample of a radioisotope to decay.

• the time it takes an atom to double in size.

• the age of an atom once it comes in contact with radiation.

Elements with atomic numbers greater than 92 (uranium) are called ______________.

• transcontinental elements

• transmutated elements.

• transuranium elements

• quark

Which element is radioactive?

• Uranium (92)

• Hydrogen (1)

• Helium (2)

• Neon (10)

²²⁰₈₇Fr —› ⁴₂He + ____

• ²²⁰₈₉Ac

• ²²⁴₉₀Th

• ²¹⁶₈₅At

• ²¹⁶₈₈Ra

¹⁴₆C —› ⁰_-1e + ____

• ¹²₆C

• ¹⁴₇N

• ¹⁴₈O

• ¹⁴₅B