Chemistry
Atomic Structure
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#1 Which subatomic particle carries a positive charge?
A) Proton
B) Electron
C) Neutron
D) Positron
Answer: A
#2 Atomic number Z equals the number of:
A) Neutrons
B) Protons
C) Electrons in all atoms
D) Nucleons
Answer: B
#3 Mass number A is equal to:
A) Protons + neutrons
B) Protons + electrons
C) Electrons + neutrons
D) Protons only
Answer: A
#4 Isotopes of an element have the same:
A) Number of neutrons
B) Mass number
C) Atomic number
D) Number of nucleons
Answer: C
#5 Isobars have the same:
A) Atomic number
B) Number of neutrons
C) Mass number
D) Electronic configuration
Answer: C
#6 Isotones have the same:
A) Number of neutrons
B) Atomic number
C) Mass number
D) Number of protons
Answer: A
#7 Who proposed the plum pudding model of atom?
A) J J Thomson
B) Rutherford
C) Bohr
D) Dalton
Answer: A
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