{{asɛmtiNe Ɔkyerɛwfo}} | Nhomakorabea | Nneɛma a ɛma wotumi yɛ ade

1

What is a half-life?

The amount of time it takes for some of the nuclei in a sample of the isotope to decay

The amount of time it takes for half the nuclei in a sample of the isotope to decay

The amount of time it takes for half the electrons in a sample of the isotope to decay

the amount of time it takes to double the nuclei in a sample of the isotope to decay

1

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

100.0g

50.0 g

12.5 g

8.5 g

1

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how much sample would be left after 3 half-lives?

1/2

1/3

1/8

1/16

1

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

0.25 g

2.5 g

25 g

80 g

1

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

3.0 g

0.25 mg

0.25 g

0.3 g

1

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

1

2

3

4

1

What is the half-life of Iodine-131?

32 days

24 days

16 days

8 days

1

If one-fourth of a sample of carbon-14 is remaining then how many half-lives have passed?

1

2

3

4

1

Why do some elements have half-lives?

Their nuclei are unstable

Their electron cloud is unstable

Half of the atom gets stolen

They are Twizzlers that break in half

1

If one has 12 kg of Polonium after two half-lives have passed, how much Polonium did you start with?

3

6

24

48

Half-Life Quiz

Half-Life Quiz

What is a half-life?

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how much sample would be left after 3 half-lives?

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

What is the half-life of Iodine-131?

If one-fourth of a sample of carbon-14 is remaining then how many half-lives have passed?

Why do some elements have half-lives?

If one has 12 kg of Polonium after two half-lives have passed, how much Polonium did you start with?

What is a half-life?

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how much sample would be left after 3 half-lives?

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

What is the half-life of Iodine-131?

If one-fourth of a sample of carbon-14 is remaining then how many half-lives have passed?

Why do some elements have half-lives?

If one has 12 kg of Polonium after two half-lives have passed, how much Polonium did you start with?