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प्रश्न
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Calcium – \[\ce{^40_20Ca}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
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उत्तर
Calcium – \[\ce{^40_20Ca}\]
Atomic number Z = p = e = 20
Mass number A = p + n
40 = 20 + n
∴ n = 40 − 20 = 20
Ca
15 = 2, 8, 8, 2
(K, L, M, N)
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संबंधित प्रश्न
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| Atomic Number | Mass Number | Protons | Neutrons | Electrons | Symbol |
| 10 | 22 | _________ | _________ | _________ | _________ |
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| List I | List II |
| 1. Mass number of an atom is the number of protons and | A: Electron |
| 2. The sub-atomic particle with a negligible mass. | B: Argon |
| 3. An atom having stable electronic configuration. | C: Nitrogen |
| 4. A molecule formed by sharing of electrons [covalency] | D: Sodium |
| 5. A metallic atom having unstable electronic configuration. | E: Neutrons |
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Give short answer:
what is the atomic mass number? mention its formula.
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