If in nature there may not be an element for which the principal quantum number $n > 4,$ then the total possible number of elements will be
$60$
$32$
$4$
$64$
$X$-rays incident on a material
What is the atomic number of gold ?
Explain Rutherford's explanation for scattered $\alpha $ -particles.
Choose the correct option from the following options given below
Which statement about the Rutherford model of the atom is not true?