47. If the de Broglie wavelength of an electron is 44 nm, what is its velocity?

Question

47. If the de Broglie wavelength of an electron is 44 nm, what is its velocity? The mas of am electron is 911 10 k a. 6.0 x 10m's b.1.203m/s c.1.7×104 m/s d. 3.1 x 101 ms e. 4.8 10-,n's 48. All of the following sets of quantum numbers are allowed EXCEPT as, 3,3 -42, m 0, m 49. How many values are there for the magnetic quantum number i t) when the value of the angular momentum quantum number (ty is 2? a. 13 b. 5 c.1d. 3 e. 16 50. Which of the following sets of quantum numbers refers to a 4d orbital? c, n = 4,42,mr-I 25 51. Which of the following electron configurations is not allowed? a. 1s 2s b. 1s 2s 2p c. e. Is

Explanation / Answer

48 answer is d because values allowed for m are -l to 0 to +l

51 answer is c because s orbital can have maximum 2 electrons.

52 answer is a

53 answer is c

54 answer is c

55 answer is e

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