Iron has a work function () of 4.50 eV. What is the longest wavelength of light, in nm, that will cause the ejection of electrons? (1 eV=1.6 x 10 19 J) nm 1 3 4 C 8 9.

Consider an electron in the hydrogen atom that transitions from the n=4 energy level to the n=2 energy level, 1. Calculate the wavelength (in nm) associated with the electron 2. Calculate the frequency (in s-1) associated with the electron 3. Calculate the amount of energy (in joules) of 1 electron that is emitted 4. Calculate the amount of energy (in kilojoules) of 1 mole of electrons that is emitted

What is the maximum number of orbitals that can be identified by the following set of quantum numbers? Note that in cases where the set of quantum numbers is not "allowed," the answer will be zero. n= 4, l= 3, ml= +4 orbital(s) n= 4, l= 2, ml= –1 orbital(s)

What is the photon energy of light with a wavelength of 959 nm?

2. A laser pointer used in the classroom emits light at 6550 A, at a power of 4.00 mW. (One watt is the SI unit of power, the measure of energy per unit of time. 1 W = 1 J/s). How many photons are emitted from the pointer in 115 seconds?

Do number 5

Hi! Wouldn't there only be five answers (and not 10) for the quantum numbers since the electrons in the d-orbitals are unpaired?

The electron in an (unbound) hydrogen atom (H(g)) is excited from the ground state to the n=3 state.Which of the following statements are true and which are false. 1. it takes less energy to ionize the electron from n=3 than it does from the ground state.2. The wavelength of the light emitted when the electron returns to the ground state from n=3 is the same as the wavelength of light absorbed to go from n=1 to n=3.3. the electron is farther from the nucleus on average in the n=3 state than in the ground state.4. The first excited state corresponds to n=3.5. The wavelength of light emitted when the electron drops from n=3 to n=2 is shorter than the wavelength of light emitted if the electron falls from n=3 to n=1.

Data for the photoelectric effect of silver are given in the table. Frequency of incident radiation (1015 s−1) Kinetic energy of ejected electrons (10−19 J) 2.00 5.90 2.50 9.21 3.00 12.52 3.50 15.84 4.00 19.15 Using these data, find the experimentally determined value of Planck's constant, h , and the threshold frequency, ν0 , for silver.

The question is in the image.