JEE PHYSICS MCQ: ATOMS

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If The uncertainity in the position of an electron is

10^{-10} {~m}

then the uncertainity in its momentum (in

{kgms}^{-1}

) measurement will be nearly.

View answer and explanation

Correct option: B

10^{-24}

Option B (

10^{-24}

) is correct because it is calculated using the Heisenberg uncertainty principle.

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The de-Broglie wavelength of an electron in the first Bohr orbit is The volume occupied by an atom is greater than the volume of the nucleus by a factor of about For a hydrogen atom, when electron jump from

n

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{n}=1

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\lambda_0

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\lambda_0

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{R_H} = 1.097\,\, \times \,\,{10^7}\,\,m

, first and second wavelength of Balmer series in hydrogen spectrum is When hydrogen atom is in its first excited level, its radius is its ground state radius