- (A) 6.022 x 1023 atoms of oxygen
- (B) 22-gram electrons
- (C) 6.022 x 1023 atms of carbon
- (D) both
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- (A) Isotopes with odd atomic number are abundant
- (B) Isotopes with odd atomic number and even mass number are abundant
- (C) Isotopes with even atomic number and even mass number are abundant
- (D) Isotopes with even atomic number and odd mass no are abundant
- (A) 1-mole molecules of water
- (B) 1-gram molecule of water
- (C) 3-gram atoms
- (D) all
- (A) CH2 C12
- (B) CH3C1
- (C) CC14
- (D) CHCL3
- (A) Relative abundance
- (B) Average mass of element
- (C) Number of isotopes
- (D) Relative isotopic mass
- (A) Atomic number
- (B) Relative abundance
- (C) Electronic configuration
- (D) All of the above
- (A) Mass number
- (B) Atomic mass
- (C) Relative abundance
- (D) all of the above
- (A) NaCl
- (B) H2O
- (C) CCI4
- (D) It can be applied to all mentioned above
- (A) lighter
- (B) intermediate
- (C) heavier
- (D) are collected at same time
- (A) different number of protons
- (B) same number of neutrons
- (C) different number of neutrons
- (D) same mass number (nucleon number)
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