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Chapter 7 Electronic Structure of Atoms. Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the most energy?

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Presentation on theme: "Chapter 7 Electronic Structure of Atoms. Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the most energy?"— Presentation transcript:

1 Chapter 7 Electronic Structure of Atoms

2 Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the most energy? 1.n = 5 to n = 4 2.n = 5 to n = 2 3.n = 3 to n = 1 4.n = 3 to n = 2 5.n = 4 to n = 2

3 1.n = 5 to n = 4 2.n = 5 to n = 2 3.n = 3 to n = 1 4.n = 3 to n = 2 5.n = 4 to n = 2 Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the most energy?

4 Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the longest wavelength? 1.n = 5 to n = 4 2.n = 5 to n = 2 3.n = 3 to n = 1 4.n = 3 to n = 2 5.n = 4 to n = 2

5 1.n = 5 to n = 4 2.n = 5 to n = 2 3.n = 3 to n = 1 4.n = 3 to n = 2 5.n = 4 to n = 2 Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the longest wavelength?

6 What are the valence electrons of vanadium? 1.4s 2 2.3d 3 3.4s 2 3d 3 4.3d 5 5.4d 5

7 1.4s 2 2.3d 3 3.4s 2 3d 3 4.3d 5 5.4d 5 What are the valence electrons of vanadium?

8 What are the valence electrons of gallium? 1.4s 2 2.4p 1 3.4s 2 3d 10 4p 1 4.4s 2 3d s 2 4p 1

9 1.4s 2 2.4p 1 3.4s 2 3d 10 4p 1 4.4s 2 3d s 2 4p 1 What are the valence electrons of gallium?

10 What is the maximum number of orbitals described by the quantum numbers: n = 3 l = 2

11 n = 3 l = 2 What is the maximum number of orbitals described by the quantum numbers:

12 What is the maximum number of electrons described by the quantum numbers: n = 4

13 What is the maximum number of electrons described by the quantum numbers: n = 4

14 How many nodal planes does a d orbital have?

15 How many nodal planes does a d orbital have?

16 How many unpaired electrons does selenium have?

17 How many unpaired electrons does selenium have?

18 How many unpaired electrons does chromium have?

19 How many unpaired electrons does chromium have?

20 What is the wavelength for radiation transmitted by WGR, 550 AM (550 kHz)? m m m m m

21 Correct Answer: m m m m m )s10(5.5 )ms10(      c

22 Predict which of the following electronic transitions will produce the longest wavelength spectral line. 1.n = 4 to n = 2 2.n = 5 to n = 2 3.n = 5 to n = 3 4.n = 6 to n = 4

23 Correct Answer: 1.n = 4 to n = 2 2.n = 5 to n = 2 3.n = 5 to n = 3 4.n = 6 to n = 4 The wavelength increases as frequency decreases. The lowest frequency (longest wavelength) is associated with the lowest energy, and the smallest energy difference here is between n = 6 and n = 4.

24 What is the wavelength of a helium  4 ion moving in a cyclotron at 1.0% the speed of light? Mass of helium  4 ion = 6.6  10  27 g  10  6 m  10  8 m  10  11 m  10  14 m

25 Correct Answer:  10  6 m  10  8 m  10  11 m  10  14 m )ms10kg)(3.010(6.6 Js)10(      mv h   

26 Which of the following is not an allowed set of quantum numbers? 1.n = 3, l = 1, m l = 1 2.n = 3, l = 3, m l =  2 3.n = 4, l = 0, m l = 0 4.n = 3, l = 1, m l =  1

27 Correct Answer: 1.n = 3, l = 1, m l = 1 2.n = 3, l = 3, m l =  2 3.n = 4, l = 0, m l = 0 4.n = 3, l = 1, m l =  1 The value of l can be no larger than n  1.

28 How many electrons maximum can exist in the 4d orbital?

29 Correct Answer: There are five 4d orbitals, each of which can contain up to 2 electrons each for a total of 10 maximum.

30 The electron subshell 3p represents the principal quantum number n = ___ and azimuthal quantum number l = ___. 1.3; 2 2.2; 3 3.3; 1 4.1; 3

31 Correct Answer: 1.3; 2 2.2; 3 3.3; 1 4.1; 3 The principal quantum number n is 3, and a p orbital indicates l = 1.

32 The maximum number of electrons in an atom that can exist in the 4f subshell and have m l =  1 is

33 Correct Answer: For any value of m l, the maximum number of electrons is 2.

34 The following orbital diagram represents the electron configuration of which element? 1.Carbon 2.Nitrogen 3.Oxygen 4.Neon 1s1s2s2s2p2p

35 Correct Answer: 1.Carbon 2.Nitrogen 3.Oxygen 4.Neon 1s1s2s2s2p2p

36 The element with the electronic configuration [Ar]4s 1 3d 5 is: 1.Manganese 2.Chromium 3.Magnesium 4.Iron

37 Correct Answer: 1.Manganese 2.Chromium 3.Magnesium 4.Iron

38 What is the characteristic outer shell electron configuration of the noble gases? 1.s 2 p 6 2.s 2 p 5 3.s 2 p 4 4.s 2 p 3

39 Correct Answer: 1.s 2 p 6 2.s 2 p 5 3.s 2 p 4 4.s 2 p 3 Noble gases have completely filled s and p orbitals, hence their lack of reactivity.

40 Which of the following orbital diagrams obeys Hund’s rule for a ground-state atom? s3s3d3d 3s3s3d 3s3s3d3d

41 Correct Answer: s3s3d3d 3s3s3d3d 3s3s3d3d


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