Question

Justify or criticize Although the isobars have same mass numbers their masses are not exactly same

Answer 1

To justify:

Although the Isobars have same mass numbers, their masses are not exactly the same.

Justification:

• Isobars atoms of different elements having different atomic number , but same atomic mass.

• This means that ; for Isobars , the number of electrons (or protons) are different but the sum of of protons and neutrons are same.

• If we compare the masses of proton and neutron we will observe that their masses are slightly different.

Now , let's take an example:

We have two atoms each with 38 atomic mass;

• So, one atom having 20 neutrons + 18 protons will have slightly different mass as compared to another atom having 18 neutrons and 20 protons.

• So, even when the mass number is same, still the actual mass is different.

Hope It Helps.

Answer 2

Answer:

Although Isobars have the same mass number, their masses are not exactly the same. This is because the mass of a neutron is not exactly the same as that of a proton, a neutron is slightly heavier. There are mass spectrometers sensitive enough to measure a hundredth of a mass of the neutron.