Question

Write the answers to the following questions:
1. Justify or criticize “Although the isobars have same mass numbers their
masses are not exactly same".
2. Why are the weights in a weight box kept in a 5:2:2:1 ratio?
3. Why is an aeroplane unable to fly in vacuum?
4. From his experiments, how did Rutherford conclude that most of the space
inside an atom is empty?​

Answer 1

Answer:

Although Isobars have the same emass number, their masses are not exactly the same.

Explanation:

(i) 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.