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Structure of Atom

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Question
CBSEENBI11005301
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Calculate the wavelength of an electron moving with a velocity of 2.05x 107 ms-1. 

Solution

we space know space that comma space straight lambda space equals straight h over mv equals fraction numerator 6.63 space straight x 10 to the power of negative 34 end exponent kgm squared straight s to the power of negative 1 end exponent over denominator 9.1 space straight x 10 to the power of negative 31 end exponent space kg space straight x 2.05 space straight x 10 to the power of 7 space ms to the power of negative 1 end exponent end fraction space equals 3.55 space straight x 10 to the power of negative 11 end exponent space straight m

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Question
CBSEENCH11005116
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Name the fundamental particles which constitute an atom.

Solution

Fundamental particles which constitute an atom are electrons, protons and neutrons.

Question
CBSEENCH11005117
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What is an Electron?

Solution

Electron is a subatomic particle having a unit negative charge (-1.602 x 10-19coulombs) and a mass (9.11 x 10-31 kg) which is 1/1837 of that of a hydrogen atom.

Question
CBSEENCH11005118
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What is a proton?

Solution

Proton is a subatomic particle of an atom having a unit positive charge (1.602x10-19 coulombs) and a mass (1.67x 10-27 kg) which is practically the same as that of a hydrogen atom.

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