Question

Problem 2

Part A

An element has four naturally occurring isotopes with the masses and natural abundances given here. Find the atomic mass of the element.

Isotope	Mass (amu)	Abundance (%)
1	89.90470	52.93
2	90.90565	11.54
3	91.90504	17.65
4	93.90632	17.88

Express your answer to four significant figures and include the appropriate units.

A =

amu

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Part B

Identify the element.

Spell out the full name of the element.

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