Question

+ Energy of photons that need to be absorbed by He+ ion to excite electrons from ground state to third energy level is​

Answer 1

Answer:

,

Explanation:

• Photoelectric effect.

Answer 2

The ionization energy of a hydrogen atom is equal to 13.6 eV because the hydrogen atom has an energy of -13.6 eV in the ground state.

Explanation:

• If an electron is in the first energy level, it must have exactly -13.6 eV of energy. If it is at the second energy level, it should have -3.4 eV of energy.
• The ground state energy of the Be3+ ion is 16 times greater than that of the hydrogen atom.
• Ionization energy is the amount of energy required to completely remove an electron when the atom is in the ground state.
• That is, the ionization energy is only the negative of the ground state energy.
• Helium has two identical 1s electrons in the ground state.
• The energy required to remove one of them is the highest ionization energy of any atom in the periodic table: 24.6 electron volts.