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Isotopes

Isotopes. Nuclear Symbol. M ass. He. 4. A tomic. 2. N umber. Hyphen Notation. Helium - 4. Isotopes Are…. Atoms w/ same # p + but different # n o  different mass # s chemically alike- react the same way b/c identical # of p + & e -

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Isotopes

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  1. Isotopes

  2. Nuclear Symbol Mass He 4 Atomic 2 Number

  3. Hyphen Notation Helium - 4

  4. Isotopes Are…. • Atoms w/ same # p+but different # no different mass # s • chemically alike- react the same way • b/c identical # of p+ & e- • Atomic Mass rounds to most abundant isotope

  5. Atomic Mass Formula Mass (amu) x Abundance (%) = Relative Mass Then add up all the relative masses or ( Mass* % Abundance) + (Mass * %Abundance)+…

  6. Example Chromium exists in 4 isotopic forms with the following abundances: Cr-50= 4.31%; Cr-52= 83.76%; Cr-53=9.55%; Cr-54=2.38% Calculate the average atomic mass of chromium.

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