| 6. | Dual characteristic of metals was described by |
| a. | Max Planck |
| b. | Stoney |
| c. | Moseley |
| d. | Louis DE Broglie |
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Answer: (d).Louis DE Broglie
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| 7. | Existence of neutron was predicted by Rutherford in year |
| a. | 1920 |
| b. | 1980 |
| c. | 1900 |
| d. | 1970 |
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Answer: (a).1920
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| 8. | Atomic model is |
| a. | flat |
| b. | not flat |
| c. | in one plane |
| d. | in one dimension |
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Answer: (b).not flat
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| 9. | Moseley law helped us to discover |
| a. | Pr |
| b. | Tc |
| c. | potassium |
| d. | sodium |
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Answer: (b).Tc
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| 10. | Maximum number of electrons that can be accommodated in a shell is given by |
| a. | 2n2 |
| b. | 2n3 |
| c. | 2n |
| d. | none |
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Answer: (a).2n2
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