Chemistry
Atomic Structure
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#81 For n = 3, maximum number of electrons is:
A) 18
B) 8
C) 32
D) 10
Answer: A
#82 Valence shell for sodium (Z = 11) is the:
A) First shell
B) Second shell
C) Third shell
D) Fourth shell
Answer: C
#83 An electron pair in the same orbital must have:
A) Same spins
B) Opposite spins
C) Same four quantum numbers
D) Same orientation
Answer: B
#84 Which is a hydrogen like species?
A) He
B) He+
C) Li
D) Be
Answer: B
#85 In hydrogen like ions, energy depends mainly on:
A) Shape
B) Orientation
C) Principal quantum number
D) Spin
Answer: C
#86 Which transition emits the highest energy photon?
A) n = 3 to n = 2
B) n = 4 to n = 3
C) n = 5 to n = 1
D) n = 2 to n = 1
Answer: C
#87 Photon energy is directly proportional to:
A) Wavelength
B) Frequency
C) Period
D) Amplitude
Answer: B
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