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Why electron cannot exist inside the...

Why electron cannot exist inside the nucleous according to heisnberg's uncertainty principle ?

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Diameter of the atomic nucleus is of the order of `10^(-15)m`
The maximum uncertainity in the position of electron is `10^(-15)m`
Mass of electron `=9.1xx10^(-31)kg`.
`Deltax. Deltap =(h)/(4pi)`
`Deltax x(m.Deltav) = h//4pi`
`Deltav = (h)/(4pi)xx(1)/(Deltax.m)=(6.63xx10^(-34))/(4xx(22)/(7))xx(1)/(10^(-15)xx9.1xx10^(-31))`
`Deltav = 5.80xx10^(10)ms^(-1)`
This value is much higher than the velocity of light and hence not possible.
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