On the Planet Melmac, in a Galaxy Far, Far Away

question 140

Multiple Choice

On the planet Melmac, in a galaxy far, far away, argon has three naturally occurring isotopes as follows: Isotope Mass (amu) Natural Abundance (%)
Argon-40 39.962 74.20
Argon-38 37.963 15.15
Argon-36 35.968 10.65
What is the relative atomic mass of argon on Melmac?

• A)39.23 amu
• B)39.96 amu
• C)37.96 amu
• D)35.97 amu
• E)40.00 amu

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