Radioactive Decay and Activity Quiz

What is the main focus of the video tutorial?

• Calculating the speed of light

• Understanding the concept of activity in radioactive decay

• Exploring the properties of water

• Studying the phases of the moon

Which isotope of carbon is used for radiocarbon dating?

• Carbon-12

• Carbon-13

• Carbon-14

• Carbon-15

What is the molar mass of carbon used in the calculations?

• 18 grams per mole

• 12 grams per mole

• 24 grams per mole

• 6 grams per mole

How many atoms are there in one mole of a substance according to Avogadro's number?

• 3.01 x 10^23

• 9.03 x 10^23

• 6.02 x 10^23

• 1.20 x 10^24

What is the half-life of carbon-14 in years?

• 4000 years

• 5730 years

• 1000 years

• 2000 years

What is the decay constant for carbon-14 expressed in per second?

• 7.89 x 10^-12

• 9.01 x 10^-12

• 5.67 x 10^-12

• 3.84 x 10^-12

In what unit is the activity of a radioactive sample expressed?

• Becquerels

• Watts

• Joules

• Newtons

What is the activity of carbon-14 in a one-gram sample of carbon?

• 0.193 becquerels

• 193 becquerels

• 1.93 becquerels

• 19.3 becquerels

If the sample size increases, what happens to the activity of carbon-14?

• It increases

• It becomes zero

• It remains the same

• It decreases

What happens to the amount of carbon-14 in living tissue over time?

• It decreases

• It remains constant

• It increases

• It fluctuates randomly