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Q. No.Which of the following statements is/are not correct?
Choose the correct option:
| (a) | Isotones differ in the number of neutrons. |
| (b) | Isobars contain the same number of neutrons but differ in the number of protons. |
| (c) | No isotope of hydrogen is radioactive. |
| (d) | The density of the nucleus is much greater than that of an atom. |
| 1. | (a), (b) and (c) | 2. | (b), (c) and (d) |
| 3. | (b) and (c) | 4. | All of the above. |
Subtopic: Â Number of Electron, Proton & Neutron |
From NCERT
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| Assertion (A): | The mass numbers of most of the elements are fractional. |
| Reason (R): | Mass numbers are obtained by comparing with the mass number of carbon taken as \(12.\) |
In light of the above statements choose the answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Number of Electron, Proton & Neutron |
From NCERT
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Q. No.
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