One
Two
Three
Four
Answer is Right!
Answer is Wrong!
The correct answer is A. One.
A hydrogen atom has one proton in its nucleus and one electron orbiting the nucleus. The electron is attracted to the proton by the electromagnetic force. The electron’s energy is quantized, meaning that it can only have certain values. The lowest energy state of the electron is called the ground state. The electron can be excited to higher energy states by absorbing energy, such as from light. When the electron falls back to a lower energy state, it emits light. This is how hydrogen
atoms emit light in the visible spectrum.Option B is incorrect because a hydrogen atom has one electron, not two.
Option C is incorrect because a hydrogen atom has one electron, not three.
Option D is incorrect because a hydrogen atom has one electron, not four.