| 31. | They are what chemists loosely call " atomic weights ."
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| 32. | In 1972, he moved to International Atomic Weights Commission where he served until 1987.
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| 33. | In 1906 Ostwald was elected a member of the International Committee on Atomic Weights.
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| 34. | The isotopes of erbium range in atomic weight from ( ) to ( ).
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| 35. | The stolen isotopes included at least 50 chemical elements in 228 different atomic weights.
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| 36. | This was followed by investigations of the atomic weights of arsenic and other elements.
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| 37. | Xenon propellant is used because of its high atomic weight and low ionization potential.
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| 38. | Langlet was the first to correctly define its atomic weight.
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| 39. | Stability of the oxyhalides decrease as the atomic weight of the component halide increases.
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| 40. | Their law was used for many years as a technique for measuring atomic weights.
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