A. | volume of the nucleus is directly proportional to the mass number. |
B. | volume of the nucleus is independent of mass number. |
C. | density of the nucleus is directly proportional to the mass number. |
D. | density of the nucleus is directly proportional to the cube root of the mass number. |
E. | density of the nucleus is independent of the mass number. |
1. | (A) and (D) only. |
2. | (A) and (E) only. |
3. | (B) and (E) only. |
4. | (A) and (C) only. |
Two nuclei have their mass numbers in the ratio of \(1:3.\) The ratio of their nuclear densities would be:
1. \(1:3\)
2. \(3:1\)
3. \((3)^{1/3}:1\)
4. \(1:1\)
Consider the following statements:
(I) | All isotopes of elements have the same number of neutrons. |
(II) | Only one isotope of an element can be stable and non-radioactive. |
(III) | All elements have isotopes. |
(IV) | All isotopes of carbon can form chemical compounds with oxygen\(\text-16\). |
The correct option regarding an isotope is:
1. | (III) and (IV) only |
2. | (II), (III), and (IV) only |
3. | (I), (II), and (III) only |
4. | (I), (III), and (IV) only |
Assertion (A): | Isotopes of an element can be separated by using a mass spectrometer. |
Reason (R): | Separation of isotopes is possible because of the difference in electron numbers of isotopes. |
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. |