AFNS — AFNS Chemistry
Atomic Structure
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#1 Nucleus contains:
A) Electrons only
B) Protons and neutrons
C) Neutrons only
D) Photons
Answer: B
#2 Atomic number equals number of:
A) Neutrons
B) Protons
C) Electrons in ion
D) Nucleons only
Answer: B
#3 Mass number is sum of:
A) Protons and electrons
B) Protons and neutrons
C) Electrons and neutrons
D) Protons only
Answer: B
#4 Rutherford experiment proved:
A) Nuclear model of atom
B) Wave nature only
C) Quantum numbers
D) Ionic bonds
Answer: A
#5 Maximum electrons in M shell:
A) 2
B) 8
C) 18
D) 32
Answer: C
#6 Hund's rule relates to:
A) Electron pairing
B) Electron filling in degenerate orbitals
C) Nuclear fusion
D) Ionic radius
Answer: B
#7 Isotope of hydrogen with one neutron:
A) Protium
B) Deuterium
C) Tritium
D) Helium
Answer: B
#8 Electronic configuration of Na (Z=11):
A) 1s2 2s2 2p6 3s1
B) 1s2 2s2 2p6 3s2
C) 1s2 2s2 2p5
D) 1s2 2s1
Answer: A
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