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Can someone check my answers? < is what I chose.

1. Which option correctly compares beta decay and gamma decay?
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1 point
Beta decay only reduces the energy level, while gamma decay releases a particle. Gamma decay is a form of nuclear fission, but beta decay is not.
Beta decay releases a particle, while gamma decay only reduces the energy level. Neither beta decay nor gamma decay is a form of nuclear fission.
Beta decay only reduces the energy level, while gamma decay releases a particle. Neither beta decay nor gamma decay is a form of nuclear fission.
Beta decay releases a particle, while gamma decay only reduces the energy level. Beta decay is a form of nuclear fission, but gamma decay is not. <

2. What kind of decay is shown in the following nuclear equation?
253 92 U --> 231 90 Th + 4 2 He

beta decay <
alpha decay
gamma decay
none of the above

3. Which statement best describes the process of alpha decay?

An unstable nucleus releases a single positively charged particle.
An unstable nucleus rearranges its particles and releases energy. <
An unstable nucleus releases an electron.
An unstable nucleus releases a particle containing two protons and two neutrons.

4. What is the missing product in the nuclear equation:
6_3 Li + 1_0 --> 4_2 He + ____

a) 3 1 H <
b) 3 1 Li
c) 1 1 H

5. What is the missing product in the nuclear equation:
31 15 P + 1 1 H --> 28 14 Si + ____

Alpha particle <
Beta particle
Proton
Neutron

6. What is the missing product in the nuclear equation:
238_92 U + 4_2 He -> ____ + 1_0

241 95 Am <
241 93 Np
241 94 Pu

Can someone correct me? I don't have much time...

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1 answer
  1. I don't understand #1. I don't understand how anyone can call releasing a beta particle "as a form of nuclear fission". It may OCCUR during nuclear fission but in my mind it is definitely NOT a "form" of nuclear fission. The same is true for alpha decay. My best guess is that you picked the teacher's choice.
    2 and 3 and 6 are incorrect.
    Here is the way to do these decay problems. You want the mass numbers to add up on both sides AND the atomic numbers to add up on both sides.
    238_92 U + 4_2 He -> ____ + 1_0
    So 238 + 4 = x + 1 so x must be what? Did you say 241?
    92 + 2 = y + 0 so y must be what? Did you say 94?
    Now look on the periodic table to see what element 94 is? I think that's Pu with a mass number of 241. Piece of cake? That makes your choice c??
    Sorry I was so late in getting back to you; however, my company just left about two hours ago.

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    DrBob222

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