Question

Variants of a chemical element that have the same number of protons but different numbers of neutrons.(1 point)

protons

neutrons

isotopes

nuclear decay
A nuclear reaction where a heavy nucleus splits into smaller nuclei, releasing energy.(1 point)

nuclear decay

fission

fusion

chain reaction
A nuclear reaction where light nuclei combine to form a heavier nucleus, releasing energy.(1 point)

nuclear decay

fission

fusion

chain reaction
A series of reactions where the products of one reaction cause further reactions.(1 point)

nuclear decay

fission

fusion

chain reaction
The process by which an unstable atomic nucleus loses energy by emitting radiation.(1 point)

nuclear decay

fission

fusion

chain reaction
Fill in the blank with the correct term. (2 points)
Isotopes are of a chemical element that have the same number of but different numbers of . This means they behave similarly in reactions but have different properties.
______________is the process of changing one element into another. This can occur naturally, such as in radioactive decay, or through human-made nuclear reactions, where elements are transformed in laboratories or nuclear reactors.(1 point)

nuclear reaction

transmutation

fission

fusion
Complete the following sentence using the appropriate terms. (1 point)
The
is the original unstable atom. The
is the new, different isotope or element left after the nuclear decay.
______________ has the potential to provide a nearly limitless source of energy if harnessed effectively and is the process that fuels the sun. (1 point)

nuclear decay

transmutation

nuclear fission

nuclear fusion
______________ is a type of nuclear reaction that is commonly used in nuclear reactors and atomic bombs.(1 point)

transmutation

nuclear fusion

nuclear decay

nuclear fission
This type of nuclear decay involves the emission of an alpha particle, which consists of two protons and two neutrons, reducing the atomic number by two.(1 point)

alpha

beta

gamma
This form of radioactive decay involves the release of radiation, which does not change the atomic number or mass but releases energy.(1 point)

alpha

beta

gamma
This type of nuclear decay involves the transformation of a neutron into a proton, emitting a negative particle and increasing the atomic number by one.(1 point)

alpha

beta

gamma
______________ is the time required for half of the radioactive atoms in a sample to decay(1 point)

break time

alpha time

beta clock

half life
Proceed to the website ‪Isotopes and Atomic Mass‬ to answer the following questions:



(2 points)

Carbon-12

Carbon-14

Oxygen-14

More than one of these
Proceed to the website ‪Isotopes and Atomic Mass‬ to answer the following question. You will utilize the mixtures tab.



(3 points)

6 amu

2 amu

1.5 amu

1 amu
Proceed to the website ‪Isotopes and Atomic Mass‬ to answer the following question: You will utilize the mixtures tab.



(3 points)

40 amu

38 amu

37.5 amu
Proceed to the website ‪Isotopes and Atomic Mass‬ to answer the following question. Utilize the mixtures tab.



Is this mixture likely to occur in nature?



(3 points)

yes

no

not enough information
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Answer 1

1) Variants of a chemical element that have the same number of protons but different numbers of neutrons.
Answer: isotopes

2) A nuclear reaction where a heavy nucleus splits into smaller nuclei, releasing energy.
Answer: fission

3) A nuclear reaction where light nuclei combine to form a heavier nucleus, releasing energy.
Answer: fusion

4) A series of reactions where the products of one reaction cause further reactions.
Answer: chain reaction

5) The process by which an unstable atomic nucleus loses energy by emitting radiation.
Answer: nuclear decay

Fill-in (Isotopes sentence):
Answer: Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons. This means they behave similarly in reactions but have different nuclear properties.

6) ____________ is the process of changing one element into another.
Answer: transmutation

Complete sentence (parent/daughter):
Answer: The parent is the original unstable atom. The daughter is the new, different isotope or element left after the nuclear decay.

7) ____________ has the potential to provide a nearly limitless source of energy if harnessed effectively and is the process that fuels the sun.
Answer: nuclear fusion

8) ____________ is a type of nuclear reaction that is commonly used in nuclear reactors and atomic bombs.
Answer: nuclear fission

9) This type of nuclear decay involves the emission of an alpha particle...
Answer: alpha

10) This form of radioactive decay involves the release of radiation, which does not change the atomic number or mass...
Answer: gamma

11) This type of nuclear decay involves the transformation of a neutron into a proton, emitting a negative particle...
Answer: beta

12) ____________ is the time required for half of the radioactive atoms in a sample to decay.
Answer: half life

Isotopes and Atomic Mass (PhET) questions:
- Which isotope is most common (2 pts)?
Answer: Carbon-12

Mixtures tab (3 pts) — average mass (example mixture of H-1 and H-2 equal):
Answer: 1.5 amu

Mixtures tab (3 pts) — other mixture average:
Answer: 37.5 amu

Is this mixture likely to occur in nature? (3 pts)
Answer: no

If you want, I can show the calculations for the mixture averages or adjust any answers if your simulation used different isotope percentages.