Question

The value of ground state energy of hydrogen atom is: -13.6 eV; (i) What does
the negative sign signify? & (ii) How much energy is required to take an
mund tate to the first excited state?​

Answer 1

Answer:

in an atom proton is also present and proton have positive charge and to attract electron . electron have positive charge

Answer 2

Answer:

i) The negative sign indicates that the electron is bound to the nucleus.

ii)  Eₙ = (-13.6)Z²/n eV

n--> energy level

Z--> atomic number

for the first excited state of hydrogen:

n=2 Z=1,

E₂ = (-13.6) (1²)/2 = -6.8 eV

therefore the energy required = 6.8 eV