What observations in ` alpha`-rays scattering experiment conducted by Rutherford led to the following inferences?
(i) Most of the space in the atom is empty .
(ii) The entire mass of the atom is cncentrated in the nucleus .
(iii) The nucleus carries positive charge .

(a) What observations in scartterting experiment led Rutherford to make the following conclusions? (i) The most of the space in an atom is empty. (ii) The whole of the mass of the atom is present in the centre of the nucleus. (iii) Nucleus has positive charge. (b) What is the value of orbital angular momentum for an electron in 2s orbital ? (c ) How many electrons in an atom may have n = 4 and m_s = + 1//2 ? (d) What physical meaning is attributed to the square of the absolute value of wave function Psi^2 ?

Which observations in scatteing experiment led Rutherford to make the following conclusions: (i) Most of the space in an atom is empty , (ii) Whole mass of an atom is present in its center. (iii) Nucleus is postively charged.

Assertion (A ): In the alpha -particle scattering experiment most of the alpha -particles pass undeviated. Reason (R ): Most of the space in the atom is empty.

Rutherford's alpha -particle scattering experiment showed that (i) electrons have negative charge. (ii) the mass and positive charge of the atom is concentrated in the nucleus. (iii) neutron exists in the nucleus. (iv) most of the space in atom is empty. Which of the above statements are correct ?

(A) most of the mass of the atom is concentrated in its nucleus. (R) all alpha particles striking a gold sheet are scattered in different directions.