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Q. Describe about Nuclei and Radioactive Decay?
Dalton consideration that atoms were unchangeable. But scientists in the late nineteenth century began to notice that some elements spontaneously emitted energy and particles. These emissions befall known as radiation. Elements that emit radiation are said to be radioactive. Quickly scientists discovered that radioactive elements changed into other elements subsequent to emitting radiation. Therefore atoms were not unchangeable as Dalton had thought.
Today we recognize that some nuclei are unstable and gain stability by emitting radiation. This process is called as radioactive decay.
Q. Write short notes on fabrication of rubber objects. Sol. Fabrication of Rubber: in the row condition rubber is composed of molecules of great length and molecular weight.
reaction of ammonium molybdate with phosphate power point
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why 4f electrons do not take part in bonding?
Q. Explain: Vulcanization of rubber is necessary. Ans. Importance of vulcanization of rubber: 1. Vulcanization makes cross-links between the long unsaturat
Separation methods: The present unit gives an introduction to the course on separation methods. It highlights the utility of separations within the analysis and recovery of pu
energy of electron in hydrogen atom
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In this synthesis of indole the addition of keto thioether to choloroamine to give sulphonium ion. this reaction is carried out at low temperature . why?
Which among the following species have the same number of electrons in its outermost as well as penultimate shell: (1) Mg 2+ (2) O 2-
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