How many electrons in K (Z=19) have n=4 and 

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#Question id: 20163

#XL - P Chemistry

The uncertainty in the position of an electron (mass 9.1 × 10^–28 g) moving with a velocity of 3.0 x 104 cms^–1 accurate up to 0.011% will be

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#Question id: 20164

#XL - P Chemistry

The radius of hydrogen atom in the ground state is 0·53 Å, the radius of ₃Li²⁺ in the similar state is

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#Question id: 20165

#XL - P Chemistry

Splitting of spectral lines under the influence of magnetic field is called

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#Question id: 20166

#XL - P Chemistry

The total number of orbitals in a shell with principal quantum number ‘n’ is

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#Question id: 20167

#XL - P Chemistry

Which of the following expressions gives the de-Broglie relationship ?

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#Question id: 20168

#XL - P Chemistry

The uncertainty in the momentum of an electron is 1·0 × 10^–5 kg ms^–1. The uncertainty in its position will be (h = 6·62 x 10^–34 kg m2s^–1)