17. What is the wavelength of light in centimeters having a frequency of 1.5 x 1

Question

17. What is the wavelength of light in centimeters having a frequency of 1.5 x 11 s? (The speed of light is 3.00 x 10* m/s.) B. 2.0 x 10 E. 4.5 x 102 C. 5.0 x 10 A. 2.0 x 1010 D. 5.0 x 10"1 18. Which of the following combinations of quantum numbers are permissible? Set # In 4 4 1/2 3 /2 A. 1 only D. 1 and 2 only B. 2 only E. 2 and 3 only C. 3 only 19. All the following statements are true EXCEPIT A, the n = 4 energy level has no f orbitals B. the 2p orbitals can have a maximum of 6 electrons the s orbital has a spherical shape D. there are 5 f orbitals in a set (or subshell) E. the n = 3 energy level has a set of d orbitals 20. The principal quantum number of the valence electrons in an atom of lead is 21. The maximum number of electrons that can be accommodated in a p subshell is A. 2 B. 4 E. 10 22. Which of the following sets of the four quantum numbers n, 1, m, and m, correctly describes an electron occupying a p orbital of the fourth energy level? A. 4,0,0, C. 4,2,0,+ D. 4,3,3, E. 4,4,4. - 23. An element that has the same valence electron configuration as phosphorus is a) antimony. b) tellurium.c) sulfur d) selenium e bromine 24. Which ground-state electron configuration is INCORRECT? b) Ca: [Ar] 4s2 c) Na: 1s2 2s2 2ps 3s a) Cr: [Arl 3d d) Zn: [Ar] 3d0 4s2e) Kr: I Ar] 3d10 4s2 4p

Explanation / Answer

17)

we have below equation to be used:

wavelength = speed of light/frequency

=(3.0*10^8 m/s)/(1.5*10^18 s-1)

= 2.0*10^-10 m

Answer: A

18)

set 1)

This is Acceptable

set 2)

This is Acceptable

set 3)

Value of l is 2

So, valid values of ml are [-2, -1, 0, 1, 2]

so, ml can't be -3

Hence, this is unacceptable

Answer: D

Feel free to comment below if you have any doubts or if this answer do not work

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