Which element has the greatest average atomic mass? iodine bromine tellurium krypton

Answer is: tellurium.

Tellurium is a chemical element with symbol Te and atomic mass of 127.60 g/mol.

Iodine is a chemical element with symbol I and atomic mass of 126.90 g/mol.

Krypton is a chemical element with symbol Kr and atomic mass of 83.79 g/mol.

Bromine is a chemical element with symbol Br and atomic mass of 79.90 g/mol.

Atomic mass of Iodine = 126.90447 g/mol

Atomic mass of Bromine = 79.904 g/mol

Atomic mass of Tellurium = 127.6 g/mol

Atomic mass of Krypton = 83.798 g/mol

Thus Tellurium has the greatest average atomic mass.

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