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Atom’s Story

Atom’s Story. How We Know What We Can’t See Looks Like Day 4 Average Atomic Mass. Isotopes. Atoms of the same element (they have the same number of protons) that have different masses because they have different numbers of neutrons. C. C. 13. C. 14. C. 11. 12.

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Atom’s Story

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  1. Atom’s Story How We Know What We Can’t See Looks Like Day 4 Average Atomic Mass

  2. Isotopes Atoms of the same element (they have the same number of protons) that have different masses because they have different numbers of neutrons. C C 13 C 14 C 11 12 Carbon – 12 makes up the greatest % of carbon in the universe MASS # 12 C 6 ATOMIC # Relative masses on the P. Table are weighted averages of the isotopes.

  3. Atomic mass is the average of all the naturally isotopes of that element. Atomic Masses Average Atomic Mass = Mass Number1 * %1 + Mass Number2 * %2 + … Average atomic Mass Carbon = 12 * .9888 + 13 * 0.0111 + 14 * 0.0001 Carbon = 12.011

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