What is 206 Pb mass number?

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Answer 1 · 2016-09-05T14:48:48

The mass number of the $^{206} P b$ $""^206Pb$ isotope is $206$ $206$ .

For lead, $Z = 82$ $Z=82$ ; if it's the $^{206} P b$ $""^206Pb$ isotope their are $206 - 82 = 124$ $206-82=124$ neutrons.

Answer 2 · 2016-09-05T14:50:23

206

The atomic number of Pb-206 is 82. Since it is an isotope, only the number of neutrons is different, which is 124 instead of the usual 125.