Structure of Atom

  • Question 1
    CBSEENBI11005301

    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
    Question 2
    CBSEENCH11005116

    Name the fundamental particles which constitute an atom.

    Solution
    Fundamental particles which constitute an atom are electrons, protons and neutrons.
    Question 3
    CBSEENCH11005117

    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 4
    CBSEENCH11005118

    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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