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The three stable isotopes of neon: " "(1...

The three stable isotopes of neon: `" "_(10)^(20)Ne`, `" "_(10)^(21)Ne` and `" "_(10)^(22)Ne` have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of three isotopes are 19.99 u, 20.99 u and 21.99 u, respectively. Obtain the average atomic mass of neon.

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Average atomic mass of neon is the weighted average of masses of three isotopes `(90.51 xx 19.99 + 0.27 xx 20.99 + 9.22 xx 21.99)/100 u=20.1771u=20.18u`.
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