Physics
Why does'nt the hydrogen atom emit X-rays?

Its energy levels are very close to each other
It has only one electron
It is very small in size
It is highly electropositive

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Physics
An electron microscope gives higher magnification than an optical microscope, because :

The electrons have more energy than the light particles
The velocity of electron is smaller than that of visible light
It uses more powerful lenses
The wavelength of electrons is smaller as compared to the wavelength of visible light

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