1.

Which element’s atoms have the greatest average number of neutrons? tin (Sn) antimony (Sb) tellurium (Te) iodine (I)

Answer»

Number of neutrons of the elements can be calculated if the atomic number and mass number is known.As, Number of neutrons= Mass number Atomic numberFor Tin(SN), the mass number is 119 and atomic number is 50, thenNumber of neutrons=119-50=69For Antimony(Sb), the mass number is 122 and the atomic number is 51, thenNumber of neutrons=122-51=71For Tellurium(Te), the mass number is 128 and atomic number is 52,thenNumber of neutrons=128-52=76 Fro IODINE(I), the mass number is 127 ANDTHE atomic number is 53, thenNumber of neutrons=127-53=74 Since, the number of neutrons are largein Tellurium, therefore Tellurium have the GREATEST average number of neutrons.



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