I am doing an atomic structure where it describes an atom/ion and you have to work out what it is. It says has 126 neutrons and 82 atomic number. so I say its lead as lead has 82 atomic number but comes out to 125 neutrons(as 207-82) instead of 126, bismuth comes to 126 neutrons but has an atomic number of 83.
What am I doing wrong and what is it?
Find out which unis are hot off the mark here