1. how do you appreciate the role of valency?
2. What are the limitations of J.J. Thomson's model of the atom?
3. Differentiate between potential energy and kinetic energy?
4. How do you appreciate the role of isotopes in medicine?
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Answers
Answer:
1. =>Valency helps in making pair of electrons needed by one and pair of electrons to be loosed to attain nearest noble gas configuration or to fulfill the octet.
2. =>Thomson's atomic model failed to explain how the positive charge holds on the electrons inside the atom. It also failed to explain an atom's stability. The theory did not mention anything about the nucleus of an atom. It was unable to explain the scattering experiment of Rutherford.
3. =>Potential energy is the stored energy in any object or system by virtue of its position or arrangement of parts. However, it isn't affected by the environment outside of the object or system, such as air or height. On the other hand, kinetic energy is the energy of an object or a system's particles in motion.
4. =>Nuclear medicine uses radioactive isotopes in a variety of ways. One of the more common uses is as a tracer in which a radioisotope, such as technetium-99m, is taken orally or is injected or is inhaled into the body. The radioisotope then circulates through the body or is taken up only by certain tissues.
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