Match the items below to the correct type of decay.   alpha   [ Choose ]  1: Occurs in massive nuclei that have too large a proton to neutron ratio.  Nucleus emits a particle with 2 protons and 2 neutrons.            2: occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other.              3: Happens when an atom drops from a higher energy state to a lower energy state.            beta      [ Choose ]  1: Occurs in massive nuclei that have too large a proton to neutron ratio.  Nucleus emits a particle with 2 protons and 2 neutrons.          2: occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other.              3: Happens when an atom drops from a higher energy state to a lower energy state.             gamma  [ Choose ]  1: Occurs in massive nuclei that have too large a proton to neutron ratio.  Nucleus emits a particle with 2 protons and 2 neutrons.            2: occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other.              3: Happens when an atom drops from a higher energy state to a lower energy state.

Question 11 The most used 'nuclear fuel' for nuclear fission is Uranium-235. HAROUSE POPIEREATEST BIZOTARARA LASTENIGHED STEFACING SIAMASTOJE Untukan a) Explain what happens to a Uranium-235 nucleus when it undergoes nuclear fission. [Suggested word count 70] b) Write an equation and explain Uranium-235 nucleus chain reaction and critical mass. (About 80 words)

Question A4 Calculate the mass (in kg) of 14C that has an activity of 1 Bq.

2) Calculate the density of the nucleus if it had a radius of 10 cm.

Complete the following nuclear equation: 244 244 Pu -- Am + mmaa alona ce

Select each of the following that is a characteristic of alpha decay. The mass number of the nucleus that decays decreases by 4. O The radiation that is produced carries a negative charge. O The atomic number of the nucleus that decays increases. The chemical element of the nucleus that decays remains unchanged. O The mass number of the nucleus that decays remains unchanged. The mass number of the nucleus that decays decreases by 2. O The radiation that is produced carries a positive charge. The atomic number of the nucleus that decays decreases.

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