Question

The energy of an electron in an hydrogen atom has a negative sign for all possible orbits because

Answer 1

lectron of the hydrogen atom does not like other external energy, thus negative energy!!

Why don't it like?

Well ,because it has to renovate it's house and make it bigger for that external electron (increase the size of atom)

Answer 2

As we assume that the energy of electron at infinity is zero

  and , we find that the energy of electron in all orbits of hydrogen atom is less than that it has at infinity

 so it is taken to be negative

its just according to me