What's the Difference between Mass Number and Atomic Weight? @tdewitt451

Tyler DeWitt | What's the Difference between Mass Number and Atomic Weight? @tdewitt451 | Uploaded October 2012 | Updated October 2024, 1 day ago.
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What's the difference between mass number and atomic weight? Mass number is the number of protons and neutrons in an atom, and it tells us about the mass of the atom in amu, or atomic mass units. Atomic weight is the average mass of all the isotopes of a certain type. It is a weighted average that takes into account the abundances of all of the different isotopes.

$Unit Conversions with Area and Volume To see all my Chemistry videos, check out http://socratic.org/chemistry How to use conversion factors to work with units like square feet, square inches, cubic feet, and cubic inches. You have to write the relationship and then square or cube both sides of the equation, and then you can use that to build a conversion factor fraction to cancel units and do dimensional analysis or factor label method.$

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