pu 2. A sodium nucleus, Na, is bombarded with alpha product nuclide can decay by

Question

pu 2. A sodium nucleus, Na, is bombarded with alpha product nuclide can decay by several routes. Which of the following sets of products does not represent potential route of decay of the product nuclide? (2) cm 23 This 10 134140b Al+ ), e. 23 13AI 3. Which of the following nuclear decay processes decreases the nuclear charge? (2) (1) electron capture (2) beta emission(3) positron emission 1 only (b) 2 only (c) 3 only (d) 1 and 2 (e) 1 and 3 4. Which one of the following statements is not correct? (2) a. Oxygen-15 is unstable because it has too few neutrons. b. Nucleons are held together in a nuclide by the electromagnetic force c. All nuclides with Z> 83 decay into more stable nuclides with smaller Z values. d. As the atomic number increases, the ratio of neutrons to protons in a nuclide increases e. Generally the number of neutrons in a nuclide equals the number of protons, or nearly so, when the atomic number is small, i.e., Z

Explanation / Answer

Q2

if alpha particles, 42He are added to 2311Na; then, expect addition of proton/neutron

atomic mass = 4+23 = 27

atomic number = 2+11 = 13

then..

from the previous data:

ignore A, since the balance will not "add up"

recall that the proton number --> 10+1 = 11 doest not matches 13

therefore, A is not possible

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