An element has three naturally occurring isotopes. Use the information below to calculate the weighted average atomic mass of the element, showing both the setup and the final answer for the calculation.

Question

anonymous · Answer

Isotope
	

Atomic Mass
	

Percent Abundance

A
	

15.99 u
	

99.762%

B
	

16.99 u
	

0.038%

C
	

17.99 u
	

0.200%

anonymous · Answer

just multiply percentage with atomic weight and then sum up like this:
15,99 * 0,99762 + etc.