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Which is correct statement about proton:
(1)Proton is nucleus of deuterium
(2)Proton is ionized hydrogen molecule
(3)Proton is ionized hydrogen atom
(4)Proton is alfa -particle
Ans: (3)Proton is ionized hydrogen atom
An isotope of iodine (Z = 53) is used to treat thyroid conditions. Its mass number is 131. How many neutrons are in its nucleus? 131 - 53 = 78 neutrons
How does a manometer measure gas pressur?e
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