Exploring Half-Life and Carbon Dating in Nuclear Chemistry

The video explores the concept of radioactive decay, focusing on isotopes and the probabilistic nature of decay. It introduces the concept of half-life, using carbon-14 as an example, and explains how isotopes decay into other elements over time. The video also covers the calculation of half-life and the randomness involved in the decay process.

What happens to the atomic number of an atom during beta decay?

• It doubles.

• It decreases by one.

• It increases by one.

• It remains the same.

How many atoms are there in one mole of carbon-12?

• 6.02 x 10^22

• 6.02 x 10^23

• 6.02 x 10^25

• 6.02 x 10^24

What is the half-life of carbon-14?

• 5,740 years

• 1,000 years

• 100 years

• 10,000 years

What is the term used to describe the time it takes for half of a radioactive sample to decay?

• Half-life

• Radioactive period

• Decay time

• Decay constant

After one half-life, what fraction of the original carbon-14 atoms remains?

• 1/4

• 1/2

• 1/16

• 1/8

If you start with 10 grams of carbon-14, how much will remain after two half-lives?

• 1.25 grams

• 5 grams

• 2.5 grams

• 7.5 grams

What is the probability that a single carbon-14 atom will decay after one half-life?

• 50%

• 25%

• 100%

• 75%

How does the concept of half-life help in understanding radioactive decay?

• It predicts the exact time an atom will decay.

• It provides a probabilistic measure of decay over time.

• It measures the total number of atoms in a sample.

• It determines the atomic number of an element.

If you have 80 grams of a substance with a half-life of 2 years, how much will remain after 6 years?

• 10 grams

• 20 grams

• 5 grams

• 40 grams

If a sample has a half-life of 5 years, how much of the original sample will remain after 15 years?

• 1/4

• 1/8

• 1/2

• 1/16