Question

1. Justify or criticize "Although the isobars have same mass numbers their
masses are not exactly same”.
tin?​

Answer 1

Answer:

this is because the mass of a neutron is not exactly the same as that of a proton, a neutron is slightly more heavy. So a molecule that has in total 20 neutrons and 18 protons will register the same mass number as one with 18 neutrons and 20 protons, but in fact the first one is a little bit more heavy. There are mass spectrometers sensitive enough to measure a hundredth of a mass number, and those are able to differientiate between these two molecules. But they are very expensive and so sensible that they need to be build underground and far from any traffic to work properly. So your average spectrometer will show all molecules with identical mass number as a single signal.

Explanation: