Q. Why doesn’t the hydrogen atom emit X-rays?

A
It is very small in size
B
It has only one electron
C
Its energy levels are very close to each other
D
it is highly electro positive
Solution:

A hydrogen atom has one proton and one electron. But hydrogen is also the least energetic element. Even the most energetic line hydrogen emits (when an electron drops down from the second shell to the first) has only enough energy to be an ultraviolet photon. So hydrogen atoms do not emit X rays.

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