Final answer:
The energy necessary to ionize a ground-state hydrogen atom using the Bohr model is -2.18 x 10-18 J.
Step-by-step explanation:
The energy necessary to ionize a ground-state hydrogen atom can be determined using the Bohr model.
The formula to calculate the energy required to ionize an atom is:
Energy = Rydberg constant *(1/n^2 - 1/n^2)
where the Rydberg constant is -2.18 x 10-18 J and n is the principal quantum number for the orbit.
For a hydrogen atom, the ground state has n = 1. Substituting the values into the formula gives:
Energy = (-2.18 x 10-18 J) * (1/1^2 - 1/∞^2)
which simplifies to:
Energy = (-2.18 x 10-18 J) * (1 - 0)
Energy = (-2.18 x 10-18 J)
Therefore, the energy necessary to ionize a ground-state hydrogen atom is -2.18 x 10-18 J.