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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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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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