Sections | |||
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Periodic Table | 28 mins | 0 completed | Learn |
Mole Concept | 37 mins | 0 completed | Learn Summary |
Isotopes | 12 mins | 0 completed | Learn Summary |
Mass Spectrometry | 9 mins | 0 completed | Learn |
Subatomic Particles | 8 mins | 0 completed | Learn |
Atomic Theory | 16 mins | 0 completed | Learn |
Thomson's Cathode Ray Tube Experiment | 8 mins | 0 completed | Learn |
Oil Drop Experiment | 7 mins | 0 completed | Learn |
The Chadwick Neutron Experiment | 6 mins | 0 completed | Learn |
Gold Foil Experiment | 10 mins | 0 completed | Learn |
End of Chapter 2 Problems | 28 mins | 0 completed | Learn |
Additional Guides |
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Periodic Table Charges |
Calculating Molar Mass |
Calculating Grams to Moles |
Assume that potassium (atomic mass = 39.10) has only two isotopes, one of which is potassium-39 (isotopic mass = 38.9637 amu, abundance = 93.258%). What is the mass of the second isotope?
A. 43.06 amu
B. 40.95 amu
C. 42.05 amu
D. 39.97 amu
E. 41.88 amu
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