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
[Ques. 2] The third brightest object in the sky is
a. the Sun.
b. the Moon.
c. Venus.
d. Mars.
[Ques. 3] A wave with a frequency of 5 Hz will have a period of ______________ s.
Fill in the blank(s) with correct word
[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.
[Ques. 5] Which of the terrestrial planets has rings?
a. Mercury
b. Venus
c. Mars
d. None of the terrestrial planets has rings.
[Ques. 6] All waves transfer ______________.
Fill in the blank(s) with correct word
[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.
[Ques. 8] Which of the following is not a terrestrial planet?
a. Earth
b. Mars
c. Jupiter
d. Venus
[Ques. 9] A wave is a propagation of ______________.
Fill in the blank(s) with correct word
[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
Quick Reply
