Rutherford's $\alpha$-particle experiment showed that the atoms have

Are atoms divisible or indivisible? Explain.

Which one did Rutherford consider to be supported by the results of experiments in which $\alpha - $ particles were scattered by gold foil?

An alpha particle of energy $K \text{ MeV}$ is moving towards a nucleus of atomic number $Z$. The distance of closest approach of the alpha particle to the nucleus in metres is

According to Richard Feynman,matter is made of which constituent particles? Why is it important? Write the atomic hypothesis.

Which source is associated with a line emission spectrum?