Question

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

Answer 1

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 number

For Tin(Sn), the mass number is 119 and atomic number is 50, then

Number of neutrons=119-50=69

For Antimony(Sb), the mass number is 122 and the atomic number is 51, then

Number of neutrons=122-51=71

For Tellurium(Te), the mass number is 128 and atomic number is 52,then

Number of neutrons=128-52=76 Fro iodine(I), the mass number is 127 and

the atomic number is 53, then

Number of neutrons=127-53=74 Since, the number of neutrons are large

in Tellurium, therefore Tellurium have the greatest average number of neutrons.

Answer 2

Answer:

Tellurium (Te)

Explanation:

Tellurium:

A semi-metallic element that occurs in a silvery-white brittle crystalline form of metallic luster, in a dark amorphous form, or combined with metals that are used especially in alloys and catalysts.

Atomic Number of Tellurium is 52

Atomic weight is: 127.60

Masses of stable isotopes is:120, 122, 123, 124, 125, 126, 128, 130

Melting point: 449.8 °C (841.6 °F)

Boiling point: 989.9 °C (1,813.8 °F)

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