Find the unit digit of 83 × 87 × 93 × 59 × 61. 

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#Question id: 20139

#XL - P Chemistry

Which of the following electronic transitions require that the greatest amount of energy be absorbed by a hydrogen atom?

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#Question id: 20140

#XL - P Chemistry

How fast an electron is moving if it has a wavelength equal to the distance it travel in one second?

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#Question id: 20141

#XL - P Chemistry

If uncertainties in the measurement of position and momentum are equal, the uncertainty in the measurement of velocity is

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#Question id: 20142

#XL - P Chemistry

Energy equivalent of 10.00 cm^–1 is

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#Question id: 20143

#XL - P Chemistry

The ratio of energy of the electron in ground state of hydrogen to the electron in first excited state of Be⁺³ is

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#Question id: 20144

#XL - P Chemistry

The shortest wavelength of H-atom in Lyman series is x, then longest wavelength in Balmer series of He⁺ is