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1. In a 16 gram sample, how many grams of the parent isotope will be left after 3 half-lives?
A. 2
B. 3
C. 8
D. 16

2. Complete the balanced nuclear reaction below.
/64 → /62 + ?
A. 1n 0
B. 0e −1
C. 4He 2
D. 147Eu


3. How does the trend of proton-to-neutron ratio change as elements become heavier?
A. Elements continue to have an equal number of protons and neutrons.
B. Heavier elements have a great number of protons per neutron.
C. Heavier elements have a greater amount of neutrons per proton.
D. There is no trend between the ratio and the mass of the element.

4. A compound of multiple atom types has less mass than those of the individual atoms they are made of. What accounts for the missing mass?
A. Gamma decay
B. Chain reactions
C. Energy stored in electron bonds
D. Energy stored in the bonds in the nucleus

5. Carbon-14 decays to carbon-12 with a half-life of 5,730 years. How old is a carbon sample containing 3 grams of carbon-14 and 9 grams of carbon-12?
A. 5,730 years
B. 11,460years
C. 17,190years
D. 22,920 years

6. A major argument against nuclear power plants is that they:
A. Produce radioactive waste materials.
B. Release large amounts of carbon dioxide into the atmosphere.
C. Generate less electricity than other types of power plants.
D. Can’t be used at night.

7. A common source of radiation that humans are exposed to come from:
A. Eatingfood
B. An x-ray examination
C. Outer space
D. All of the above

8. Complete the following balanced nuclear reaction.
/92+/0→/36+ 1/0+?

A. 4He 2
B. 0e −1
C. 143Ba 56
D. 144Xe 54

Sagot :

mickymike92

Based on the half-life of the radioactive sample and the properties of nuclear reactions, the correct options are:

  1. option A
  2. option C
  3. option C
  4. option D
  5. option B
  6. option A.
  7. option C.
  8. option C

What is half-life?

Half-life is the time taken for half the amount of atoms in an a radioactive element to decay.

1. After three half-lives, (1/2)³ of the original amount will remain = 1/8

1/8 of 16 = 2 ; option A

2. The balanced nuclear equation is given below:

action below:

/64 → /62 + 4He 2 ; option C

3. The trend of proton-to-neutron ratio as elements become heavier is that heavier elements have a greater amount of neutrons per proton; option C

4. The loss in mass of a compound composed of multiple atom types than those of the individual atoms they are made of is due to energy stored in the bonds in the nucleus known as the binding energy; option D

5. Initially, 12 g of carbon-14 was present

After one half-life, 6 g of carbon-14 remained, and 6 g of carbon-12 was present.

After two half-lives, 3 g of carbon-14 remained, and 9 grams of carbon-12 was present.

Age of the carbon sample = 5730 * 2 = 11460 years; option B

6.  A major argument against nuclear power plants is that they produce radioactive waste materials; option A.

7.  A common source of radiation that humans are exposed to come from outer space in the form of ultraviolet rays; option C.

8. The  balanced nuclear reaction is:

/92+/0 → /36+ 1/0 + 143Ba 56 ; option C

In conclusion, nuclear reaction results in changes in the nucleus of atoms.

Learn more about nuclear reactions at: https://brainly.com/question/1272441

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