| 1 |
In ________________ Bohr considered hydrogen atom for his model . |
- A. 1913
- B. 1916
- C. 1917
- D. 1918
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| 2 |
In ________________ Rutherford's was studying radiations. |
- A. 1911
- B. 1931
- C. 1921
- D. 1922
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| 3 |
________________ orbital is more complex in shape. |
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| 4 |
The no.of neutrons in deutrium is |
|
| 5 |
The value of Planck's constant is |
- A. 6.63 x 10-34 Js
- B. 6.63 x 10-32 Js
- C. 6.63 x 10-30 Js
- D. 6.63 x 10-28 Js
|
| 6 |
The lowest energy level is |
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| 7 |
Electron ________________ energy when they jump from low to higher level. |
- A. Absorb
- B. Radiate
- C. Nothing
- D. Nil
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| 8 |
Which of the following can accommodate 18 electrons? |
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| 9 |
"Atoms" means _________ |
- A. Divisible
- B. Indivisible
- C. Break
- D. Nil
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| 10 |
Atoms of elements combine chemically to form:<br> |
- A. Mixtures<br>
- B. compounds<br>
- C. solutions <br>
- D. ions<br>
|