Provide a symbol for the isotope of bismuth that contains 124 neutrons.?

1 Answer
anor277
May 16, 2018

Well, what is #Z# for bismuth?

Explanation:

#Z=83#...how did I know that?

And since the isotopic mass is to a first, good approximation the SUM of the massive nuclear particles...the mass of this isotope is #83+124=207*"amu"#

And so we get #""^207Bi#...why don't I have to specify #Z# in this isotopic notation?

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