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प्रश्न
Match the names of the Scientists given in column A with their contributions towards the understanding of the atomic structure as given in column B
| (A) | (B) | ||
| (a) | Ernest Rutherford | (i) | Indivisibility of atoms |
| (b) | J.J.Thomson | (ii) | Stationary orbits |
| (c) | Dalton | (iii) | Concept of nucleus |
| (d) | Neils Bohr | (iv) | Discovery of electrons |
| (e) | James Chadwick | (v) | Atomic number |
| (f) | E. Goldstein | (vi) | Neutron |
| (g) | Mosley | (vii) | Canal rays |
उत्तर
| (A) | (B) | ||
| (a) | Ernest Rutherford | (iii) | Concept of nucleus |
| (b) | J.J.Thomson | (iv) | Discovery of electrons |
| (c) | Dalton | (i) | Indivisibility of atoms |
| (d) | Neils Bohr | (ii) | Stationary orbits |
| (e) | James Chadwick | (vi) | Neutron |
| (f) | E. Goldstein | (vii) | Canal rays |
| (g) | Mosley | (v) | Atomic number |
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संबंधित प्रश्न
The atomic number of an element E is 16. The number of electrons in its ion E2– will be :
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The atom of an element X contains 17 protons, 17 electrons and 18 neutrons whereas the atom of an element Y contains 11 protons, 11 electrons and 12 neutrons.
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- What type of ion will be formed by an atom of element Y ? Write the symbol of ion formed.
- What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from Y ?
- What is the atomic mass of (i) X, and (ii) Y ?
- What could the elements X and Y be ?
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