Question

7. Cirele the letter of each statement that is true of quantum numbers for electrons within an atom. a. The principal quantum number can have any value from 0 to 7, b. The spin quantum number can have only 1 of 2 possible values. c. The magnetic quantum number depends on the spin quantum number d. All quantum numbers must have different values for a single electron. e. Each electron has a unique set of values for the 4 quantum numbers. 8. Circle the letter of each true statement in Quantum Mechanics. a. An electron in an atom has certain energies that are forbidden to it. b. De Broglie stated that momentum and wavelength are equivalent. c, h=h/4m d. Heisenberg's Uncertainty Principle says that you can never determine position and energy to an arbitrary accuracy at the same time. e. Light has momentum even though it has no mass.

Answer 1

7 a. The principal quantum number can have any positive integer value from 1 to so on. 0 is not possible as it give infinite energy. E=-(13.6 /n²) eV, n=1,2,so on. "so except for 0 in statement everything is correct"

b. Spin quantum number has 2 values"spin up" or "spin down" . So electron can have either of the two values." correct"

c.The magnetic quantum number ml depends on azimuthal quantum number l ,not spin quantum number."in place of spin the correct word azimuthal should used"

d.It is not necessary to have different value of quantum number for one electron,as ml takes value from -l to l where ml is spin quantum number, l is azimuthal quantum number." in place of must should can be used"

e. Each electron in an atom has unique set of quantum number as they follow Pauli;s Exclusion principle. "correct"

8 a. correct

b. momentum = h/ wavelength . momentum is related to wavelength they are not equivalent ." related must be used in place of equivalent"

c. hbar= h/2 *pi . incorrect

d . Correct. basic principle of Quantum mechanics.

e.light has momentum =h/$\lambda$ where h is planck's constant $\lambda$is wavelength." correct"