1.

Choose the correct option (a) Rutherford's alpha-particle scattering experiment discovered A. Electron B. Proton C. Atomic nucleus D. Neutron (b) Number of valence electrons in O2− is : A. 6 B. 8 C. 10 D. 4 (c) Which of the following is the correct electronic configuration of potassium ? A. 2, 8, 9 B. 8, 2, 9 C. 2, 8, 8, 1 D. 1, 2, 8, 8

Answer»

Choose the correct option

(a) Rutherford's alpha-particle scattering experiment discovered

A. Electron B. Proton

C. Atomic nucleus D. Neutron

(b) Number of valence electrons in O2 is :

A. 6 B. 8

C. 10 D. 4

(c) Which of the following is the correct electronic configuration of potassium ?

A. 2, 8, 9 B. 8, 2, 9

C. 2, 8, 8, 1 D. 1, 2, 8, 8



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