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प्रश्न
What do you think would be the observation of `alpha` particle scattering experiment if carried out on (i) heavy nucleus like platinum (ii) light nuclei like litheum.
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उत्तर
(i) If the foil of a heavy metal like platinum (having a very heavy nucleus) is used, then the observations in the αα-particle scattering experiment would be the same as that in the gold foil experiment
(ii) If, however, the foil of a right metal like lithium (having a very light nucleus) is used, then the fast moving heavy αα-particles may even push the light nucleus aside and may not be deflected back.
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संबंधित प्रश्न
Five atoms are labelled from A to E.
| Atoms | Mass No. | Atomic No. |
| A | 40 | 20 |
| B | 19 | 9 |
| C | 7 | 3 |
| D | 16 | 8 |
| E | 14 | 7 |
(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?
Separate the following compounds into three categories - ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.
Fill in the blank.
___________ single covalent bonds are formed between the carbon and chlorine atoms.
Name the following:
Two atoms having the same number of protons and electrons but different number of neutrons.
Identify the following reaction as either oxidation or reduction:
K - e- → K+
Elements with stable electronic configurations have eight electrons in their valence shell. They are ______.
Complete the table give below.
| Element |
Atomic number |
Electron distribution | Valence electrons | Lewis dot structure |
| Lithium | 3 | 1s22s1 | ||
| Boron | 5 | 1s22s22p1 | ||
| Oxygen | 8 | 1s22s22p4 |
Choose the odd one out and write the reason:
Choose the odd one out and write the reason:
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is chemically inert.
