Chemistry
Atomic Structure
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#9 The nucleus of the atom was discovered by:
A) Millikan
B) Rutherford
C) Bohr
D) Thomson
Answer: B
#10 According to Bohr, electrons revolve in:
A) Random paths
B) Discrete energy levels
C) Elliptical clouds
D) Inside the nucleus
Answer: B
#11 Which particle has the least mass?
A) Electron
B) Proton
C) Neutron
D) Alpha particle
Answer: A
#12 Charge on an electron is:
A) Negative
B) Positive
C) Neutral
D) Double positive
Answer: A
#13 Most of the volume of an atom is:
A) Empty space
B) Nucleus
C) Protons
D) Neutrons
Answer: A
#14 The visible lines of the hydrogen spectrum constitute the:
A) Lyman series
B) Balmer series
C) Paschen series
D) Pfund series
Answer: B
#15 The series of hydrogen spectrum in the ultraviolet region is:
A) Lyman series
B) Balmer series
C) Paschen series
D) Brackett series
Answer: A
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