5468694
Description
Flashcards by Yong Cheng Lai, updated more than 1 year ago
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Created by Yong Cheng Lai
about 8 years ago
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| Question | Answer |
| Relative Isotopic Mass (RIM) | mass of one atom of the isotope _______________ 1/12 the mass of a C-12 atom |
| Isotopes of C-12 was chosen as standard because | 1) C-12 is abundant in nature. 2) It can be easily identified in a mass spectrometer. 3) easy to handle since it exists as a solid at r.t. and pressure. |
| Relative atomic mass (Ar) | average mass of an atom of the element ______________ 1/12 the mass of a C-12 atom |
| Relative molecular mass (Mr) | average mass of 1 molecule of the element/compound _________________ 1/12 of mass of one C-12 atom |
| Relative formula mass (RFM) | mass of 1 formula of ionic compound _____________________ 1/2 of mass of 1 atom of C-12 |
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