Homework answers / question archive / 31)Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5

31)Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5

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31)Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49 x 10 ¹⁴ Hz.  Planck's constant 6.626x10^-34 J.s

a)2.75 x 10 ^-19 J

b)3.64 x 10 ^-19 J

c)5.46 x 10 ^-19 J

d)1.83 x 10 ^-19 J

e)4.68 x 10 ^-19 J

 

32)Identify the correct values for a 1s sublevel.

a)n = 3, l = 1, m_l = 0

b)n = 2, l = 1, m_l = -2

c)n = 1, l = 0, m_l = 0

d)n = 2, l = 0, m_l = 0

e)n = 4, l = -1, m_l = -2

 

33)Give the numbers for  m_l for a d orbital.

a)0, 1, 2, 3, 4

b)1, 2, 3, 4, 5

c)1, 2, 3

d)-2, -1, 0, 1, 2

 

34)How many valence electrons do the noble gases possess?

a)1

b)2

c)7

d)6

e)8

 

35)In which orbital below would an electron (on average) be farthest from the nucleus?

a)1s

b)f

c)3s

d)3d

e)2p

 

36)Which of the following statements is TRUE?

a)The principal quantum number (n) describes the shape of an orbital.

b)The angular momentum quantum number (l) describes the the size and energy associated with an orbital.

c)The magnetic quantum number (m_l) describes the orientation of the orbital.

d)An orbital is the path that an electron follows during its movement in an atom.

e)All of these are true.

 

37)An element that has the valence electron configuration 6 s ²6 p ⁶ belongs to which period and group?

a)period 6; group 6A

b)period 6; group 8A

c)period 7; group 6A

d)period 7; group 8A

 

38)Each of the following sets of quantum numbers is supposed to specify an orbital. Choose the one set of quantum numbers that does not contain an error.

a)n = 2, l = 2, m_l =-1

b)n = 2, l = 2, m_l =0

c)n = 3, l = 2, m_l =-3

d)n = 4, l = 3, m_l =-2

e)n = 4, l = 2, m_l =+4

 

39)Give the numbers for  m_l for a d orbital.

a)0, 1, 2, 3, 4

b)1, 2, 3, 4, 5

c)1, 2, 3

d)-2, -1, 0, 1, 2

 

40)Place the following types of electromagnetic radiation in order of decreasing energy. 

Ultraviolet radio waves microwaves

 

a)radio waves > microwaves > ultraviolet light

b)ultraviolet light > microwaves > radio waves

c)radio waves > ultraviolet light > microwaves

d)ultraviolet light > radio waves > microwaves

e)microwaves > radio waves > ultraviolet light