what is the wavelength, in nm, of the photon required to ionize a strontium atom if the ionization energy of strontium is 549kJ/ mol

what is the wavelength, in nm, of the photon required to ionize a strontium atom if...
The IE1, for strontium, is 551 kJ/mol. Calculate the wavelength(in nm) of electromagnetic energy need to ionize a strontium atom. Answer written to one decimal place. NA=6.022x1023 entities/mol Numeric Response
An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is 234 nm and immediately emits a photon whose associated wavelength is 550 nm. How much net energy is absorbed by the atom in this process?
The first ionization energy, E, of a sodium atom is 5.00×10^2 kJ/mol. What is the wavelength of light, in nanometers, that is just sufficient to ionize a sodium atom? (Please report wavelength in nm as the answer.)
An atom with a first ionization energy of 939 kJ/mol, requires a photon of what maximum wavelength (nm) in order to remove a single electron from a single atom?
What is wavelength of a photon that would be emitted when a hydrogen atom makes a transition from the n = 3 to the n = 2 energy level? What is the longest wavelength photon that could ionize a hydrogen atom originally in its ground state? What processes might occur if an electron of energy 12.2 eV collides with a hydrogen atom at rest and in its ground state?
The first ionization energy, E, of a potassium atom is 0.696 aJ. What is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom?
A hydrogen atom emits a photon of wavelength 656 nm. From what energy orbit to what lower-energy orbit did the electron jump?
A hydrogen atom emits a photon of wavelength 486 nm. From what energy orbit to what lower energy orbit did the electron jump? ninitial= nfinal=
The electron in a ground-state H atom absorbs a photon of wavelength 121.57 nm. To what energy level does the electron move?
A H atom emitts a photon with a wavelength of 6.57 × 102 nm. If the energy of the initial state of the H atom was -2.42 × 10(-19) J, calculate the energy of the final state. Express answer in scientific notation.