1. Which phrase describes radioactive decay?
the spontaneous emission of radiation
the joining of small nuclei into a larger nucleus
the splitting of a large nucleus into smaller nuclei
the triggering of one reaction by the products of another
2. Based on the nuclear symbol, how many protons are contained in the following isotope?
37 17 CI
17
20
37
3. Based on the nuclear symbol, how many neutrons are contained in the following isotope?
17 8 O
8
9
17
25
4. Which option would be an appropriate model of nuclear fusion?
adding a drop of water to a glass of water
sewing one piece of fabric to another
putting a puzzle together
mashing two marshmallows together
5. Which types of particles are involved in a fission reaction?
A neutral neutron strikes a large positive nucleus.
A positive proton strikes a large neutral nucleus.
A neutral neutron strikes a large neutral nucleus.
A positive proton strikes a large positive nucleus.
6. What best describes nuclear fusion?
There is little energy released during a nuclear fusion reaction
Nuclear fusion does not occur naturally in the universe
A nuclear fusion reaction requires an extraordinary amount of energy
"splitting an atom" is common when describing nuclear fusion
7. In which type of radioactive decay does the nucleus become more stable without changing its identity?
gamma decay
beta-plus decay
beta-minus decay
alpha decay
8. An alpha particle is equivalent to the nucleus of an atom of which element?
helium
carbon
hydrogen
nitrogen
9. Gamma radiation is used to treat certain types of tumors deep in the brain that cannot be accessed with surgery. What possible reason to explain why gamma radiation is preferred over beta decay or alpha decay for this treatment?
Gamma radiation is not harmful to human tissue
Alpha decay has greater penetrating power than gamma radiation or beta decay
When an atoms mass emits a beta particle, its mass does not change
Gamma radiation has greater penetrating power than beta or alpha decay
Thank you, I AM having a great day; however, I'm not about to answer 10 questions when you've shown no work at all. You tell me what you think and why and I'll help. You can also pick a question and explain fully what you don't understand or why you're having trouble with it and I'll help you through it. It's just that I'm not in the freebie mood right now. Here's a freebie. #8 is helium nucleus in an alpha particle.
Thank you and you did great. I disagree with 5. I think a better answer is c.
For #9 d is the correct answer.
Sorry I took so long to get back to you but I had company @ noon. My visitors just left.
sounds fair. ill give an answer a bit later since I'm busy rn ty bob :)
1. Which phrase describes radioactive decay?
the spontaneous emission of radiation <
the joining of small nuclei into a larger nucleus
the splitting of a large nucleus into smaller nuclei
the triggering of one reaction by the products of another
2. Based on the nuclear symbol, how many protons are contained in the following isotope?
37 17 CI
17 <
20
37
3. Based on the nuclear symbol, how many neutrons are contained in the following isotope?
17 8 O
8
9 <
17
25
4. Which option would be an appropriate model of nuclear fusion?
adding a drop of water to a glass of water
sewing one piece of fabric to another
putting a puzzle together
mashing two marshmallows together <
5. Which types of particles are involved in a fission reaction?
A neutral neutron strikes a large positive nucleus. <
A positive proton strikes a large neutral nucleus.
A neutral neutron strikes a large neutral nucleus.
A positive proton strikes a large positive nucleus.
6. What best describes nuclear fusion?
There is little energy released during a nuclear fusion reaction
Nuclear fusion does not occur naturally in the universe
A nuclear fusion reaction requires an extraordinary amount of energy <
"splitting an atom" is common when describing nuclear fusion
7. In which type of radioactive decay does the nucleus become more stable without changing its identity?
gamma decay <
beta-plus decay
beta-minus decay
alpha decay
8. An alpha particle is equivalent to the nucleus of an atom of which element?
helium <
carbon
hydrogen
nitrogen
9. Gamma radiation is used to treat certain types of tumors deep in the brain that cannot be accessed with surgery. What possible reason to explain why gamma radiation is preferred over beta decay or alpha decay for this treatment?
Gamma radiation is not harmful to human tissue
Alpha decay has greater penetrating power than gamma radiation or beta decay <
When an atoms mass emits a beta particle, its mass does not change
Gamma radiation has greater penetrating power than beta or alpha decay
< = what i chose
:)
dr. bob i rlly need ur help on this one!! :( I just need my answers checked and corrected.
oh, no worries! and thank you for the help! i have some more though, do you think you can see if I did okay on those too?
I have answered all you posted above.
1. The phrase that describes radioactive decay is "the spontaneous emission of radiation." Radioactive decay is the process by which the nucleus of an unstable atom releases energy in the form of radiation.
2. To determine the number of protons in an isotope, we look at the atomic number, which is represented by the subscript. In the nuclear symbol CI (carbon-37), the subscript 17 represents the number of protons. Therefore, there are 17 protons in this isotope.
3. To calculate the number of neutrons in an isotope, we subtract the number of protons (given by atomic number) from the mass number, which is represented by the superscript. In the nuclear symbol 17 8 O (oxygen-17), the superscript 17 represents the mass number, and the subscript 8 represents the number of protons. Subtracting the number of protons (8) from the mass number (17), we find that there are 9 neutrons in this isotope.
4. The appropriate model of nuclear fusion would be "mashing two marshmallows together." In nuclear fusion, two smaller atomic nuclei combine to form a larger atomic nucleus, similar to how two marshmallows can be pressed together to form one larger marshmallow.
5. The types of particles involved in a fission reaction are "A neutral neutron strikes a large positive nucleus." In nuclear fission, a larger atomic nucleus, typically with a high atomic number, is split into two smaller nuclei by the impact of a neutron.
6. The statement that best describes nuclear fusion is that "A nuclear fusion reaction requires an extraordinary amount of energy." Nuclear fusion is the process by which two lighter atomic nuclei combine to form a heavier nucleus, releasing a significant amount of energy in the process. This reaction requires extremely high temperatures and pressures to overcome the electrostatic repulsion between the positively charged nuclei.
7. The type of radioactive decay in which the nucleus becomes more stable without changing its identity is "gamma decay." Gamma decay is the emission of high-energy photons, called gamma rays, from an excited atomic nucleus. This type of decay does not change the atomic number or mass number of the nucleus.
8. An alpha particle is equivalent to the nucleus of an atom of "helium." An alpha particle consists of two protons and two neutrons, making it identical to a helium nucleus.
9. Gamma radiation is preferred over beta decay or alpha decay for treating certain types of tumors deep in the brain because "gamma radiation has greater penetrating power than beta or alpha decay." Gamma rays are highly energetic and can penetrate through tissues deeply, allowing them to reach the tumor site effectively. Beta particles and alpha particles have shorter ranges and may not reach the target area in sufficient quantities.