Atomic Structure — Chemistry MCQs (Class 11)
Free chapter-wise Chemistry MCQs with answers for MDCAT, FSc and entry tests.
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#9 The nucleus of the atom was discovered by:
A) Millikan
B) Rutherford
C) Bohr
D) Thomson
#10 According to Bohr, electrons revolve in:
A) Random paths
B) Discrete energy levels
C) Elliptical clouds
D) Inside the nucleus
#11 Which particle has the least mass?
A) Electron
B) Proton
C) Neutron
D) Alpha particle
#12 Charge on an electron is:
A) Negative
B) Positive
C) Neutral
D) Double positive
#13 Most of the volume of an atom is:
A) Empty space
B) Nucleus
C) Protons
D) Neutrons
#14 The visible lines of the hydrogen spectrum constitute the:
A) Lyman series
B) Balmer series
C) Paschen series
D) Pfund series
#15 The series of hydrogen spectrum in the ultraviolet region is:
A) Lyman series
B) Balmer series
C) Paschen series
D) Brackett series
#16 The principal quantum number n primarily indicates the orbital:
A) Shape
B) Orientation
C) Size and energy level
D) Spin
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