What is characteristic of alpha decay? (a) A neutron decays into a proton and an

Question

What is characteristic of alpha decay? (a) A neutron decays into a proton and an electron: the electron is ejected. (b) A nucleus converts its energy of spinning into a high-energy photon (light particle). (c) A proton and an electron combine to form a neutron. (d) An unstable nucleus releases two protons and two neutrons that are bound together. According to the class lecture, why is radiotherapy, which can cause cancer, used to treat cancer? (a) Radiation damages DNA, and so preferentially targets cells that multiply quickly like cancer. (b) Unlike chemotherapy, which affects the whole body, radiotherapy can be used to treat only a specific area of the body. (c) The risk of cancer caused by radiotherapy is very small. (d) All of the above reasons are reasons why radiotherapy is used to treat cancer.

Explanation / Answer

3)

The correct option is (d)

Explanation :aplha particle is helium nuceus that results from the emission of 2 neutrons and 2 protons. After that decay, the atomic number of the nucleus decreases by 2 and the atomic mass decreases by 4.

4)

Answer :(d)

Explanation :Radiotherapy is use of radioactive waves to kill cancerous cells. It's use is specific to are and it's side-effects are lesser than chemotherapy or other modes of operation.

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