1.2 Atomic Mass vs Weight

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4 Terms

1
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Atomic Mass

• Equal to the mass number, the sum of an element’s protons and neutrons

2
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Isotopes

• Atoms of a given element (same atomic number) that have different mass numbers. They differ in the number of neutrons.

• Isotopes of hydrogen - protium, deuterium, tritium

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Atomic Weight

• Weighted average of the naturally occurring isotopes of an element.

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Avogadro’s Number

• 6.02 × 10²³, mols represents the number of things