Alpha rays are nuclear radiations. They are in fact same as _ nuclei.
Correct answer: D. Helium
- A. Hydrogen
- B. Deuterium
- C. Tritium
- D. Helium
- E. Lithium
Explanation
Option A: Hydrogen is the simplest element in the periodic table. It has one proton and no neutrons. Option B: Deuterium is an isotope of hydrogen. It has one proton and one neutron. Option C: Tritium is an isotope of hydrogen. It has one proton and two neutrons. Option D: Helium is an element with two protons and two neutrons. Option E: Lithium is an element with three protons and four neutrons.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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