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7 June, 01:19

Iron (fe) has 26 protons and 30 neutrons which of the following is most likely atomic weight of iron

A) 26.84

B) 30.84

C) 55.84

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Answers (1)
  1. 7 June, 01:21
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    Proton mass = 1.673 x 10-27 kgneutron mass = 1.675 x 10-27 kg Mass of the isotope: M = [26 (1.673 x 10-27) + 32 (1.675 x 10-27) ] kg = 9.710 x 10-26 kg (b) Mass number = 26 + 32 = 58Atomic number = 26 Symbol: 5826Fe
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