located in \"stationary B) Part of the Bohr model proposed that electrons in the
ID: 1032563 • Letter: L
Question
located in "stationary B) Part of the Bohr model proposed that electrons in the hydrogen atom are states" or particular orbits around the nucleus location and speed of C) The uncertainty principle states that we can never know both the exact an electron. D) An orbital is the volume in which we are most likely to find an electrosn E) All of the above are true 6) Determine the velocity of a medicine ball (m-10.0 kg) with a wavelength of 1.33 10-35 m. A) 8.81 m/s B) 12.3 m/s C) 221 m's D) 4.98 m/s E) 6.44 m/s 7) Calculate the energy change associated with the transition from n-4 to n-1 in the hydrogen atom. A)+4.89x 10-18J B) +1.64 x 10-18 J C)-6.12 x 10-18 J D) +3.55 x 10-18 J E)-2.04 x 10-18 8) Each of the following sets of quantum numbers is supposed to specify an orbital. Which of the following sets of quantum numbers contains an error? B)a-4, 1-2, m1-0 C)n- 3,1-3, m-2 D)n-1,1-O, m- E) n = 3, 1-0,ml-o 9) Which of the following quantum numbers describes the shape of an orbital? A) principal quantum number B) magnetic quantum number C) spin quantum number D) Schrödinger quantum number E) angular momentum quantum number 10) Give the numbers for m for a d orbital. A) 0, 1, 2,3,4 ) 1, 2, 3, 4, 5 C) 1.2, 3Explanation / Answer
ANSWER
Q6. Question is based on de Broglie equation as
= h/mv
v = h/m = 6.6 X 10-34 Js / 10.0 X 1.33 X 10-35m = 4.98 m/s (Option D)
Q7.
Energy change (E) = - 2.18 X 10-18J (1/ni2 - 1/nf2)
E = - 2.18 X 10-18J (1/ 12 - 1/42) = -2.04 X 10-18J (optionE)
Q8 Option is the correct answer. This set of quantum numbers has the error, as n cant be equal to l. But in this case n= l =3.
Q9. Option (E) is the correct answer. Azimuthal or angular moment quantum number dscribes the shape of orbital.
Q10. Option (D) is the correct answer. For a given value of l ml has values ranging from -l to +l
For d-orbital l = 2, ml = -2 to +2 = -2, -1, 0 ,1 ,2
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