Biology Forums - Study Force

What is the difference in frequency for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097  107 m1.)
 a. 5.65  1013 Hz
  b. 31 Hz
  c. 1.77  1012 Hz
  d. 2.55  1016 Hz
  e. 1.02  1017 Hz

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[Ques. 2] The third brightest object in the sky is
 a. the Sun.
  b. the Moon.
  c. Venus.
  d. Mars.

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[Ques. 3] A wave with a frequency of 5 Hz will have a period of ______________ s.
 Fill in the blank(s) with correct word

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[Ques. 4] In a completely filled atomic shell,
 a. the intrinsic spin of the electrons does not produce a resultant magnetic moment.
  b. the orbital motion of the electrons does not produce a resultant magnetic moment.
  c. the atom will be an alkali metal.
  d. only (a) and (b) are correct.
  e. none of the above are correct.

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[Ques. 5] Which of the terrestrial planets has rings?
 a. Mercury
  b. Venus
  c. Mars
  d. None of the terrestrial planets has rings.

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[Ques. 6] All waves transfer ______________.
 Fill in the blank(s) with correct word

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[Ques. 7] When electrons fill a subshell in which the orbitals have equal energy, the order in which the orbitals are filled is such that
 a. a minimum number of electrons has unpaired spins.
  b. a minimum number of electrons has intrinsic angular momentum.
  c. a maximum number of electrons has unpaired spins.
  d. a maximum number of electrons first fills the next energy level.
  e. the maximum number of electrons has the same set of quantum numbers.

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[Ques. 8] Which of the following is not a terrestrial planet?
 a. Earth
  b. Mars
  c. Jupiter
  d. Venus

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[Ques. 9] A wave is a propagation of ______________.
 Fill in the blank(s) with correct word

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[Ques. 10] Rubidium (Z = 37) and potassium (Z = 19) are similar to sodium in that they have ____ electron(s) in the outermost shell.
 a. five p
  b. three p
  c. two s
  d. one d
  e. one s

1)  c

2)  c

3)  1/5, or 0.2

4)  d

5)  d

6)  energy

7)  c

8)  c

9)  energy, or disturbance

10)  e

no worries, happy to help out