Which element has the largest average
atomic mass?
a. argon (ar)
b. xenon (xe)
c. krypton (kr)
d. neon (ne)

Explanation:

The average atomic mass of an element is defined as the sum of the masses of its isotopes,each multiplied by their natural abundances.

Option A:

Argon has a average atomic mass of

Option B:

Xenon has a average atomic mass of

Option C:

Krypton has a average atomic mass of

Option D:

Neon has a average atomic mass of

So,Xenon has the highest average atomic mass.

a.   mass number from atomic number

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