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Question
Define the following form:
Isotope
Solution
Isotopes are atoms that have the same atomic number but a different mass number. Isotopes have the same numbers of protons but different numbers of neutrons.
These are some common examples of isotopes:
- 2He, 4
- 2He, 12
- 6C, 14
- 6C, 235
- 92U, 239
- 92U, 289
RELATED QUESTIONS
Isotopes of an element have ______.
State whether the following statement is true or false :
Radioactive isotope of iodine is used for making the medicine called tincture iodine.
Hydrogen has three isotopes written as :
`""_1^1"H"` `""_1^2"H"` `""_1^3"H"`
Explain why :
(i) these isotopes have almost identical chemical properties.
(ii) they are electrically neutral.
The isotopes of an element contain :
The number of protons, neutrons and electrons in particles A to E are given below :
| Particle | Protons | Neutrons | Electrons |
| A | 17 | 18 | 17 |
| B | 3 | 4 | 2 |
| C | 18 | 22 | 18 |
| D | 17 | 20 | 17 |
| E | 9 | 10 | 10 |
Giving reasons, find a pair of isotopes from the above particles.
Give one example of isotopes.
Identify the pairs which are not of isotopes?
(i) 126X, 136Y
(ii) 3517X, 3717Y
(iii) 146X, 147Y
(iv) 84X, 85Y
Distinguish isotopes from isobar.
Distinguish isotopes from isobar.
How is the radioactivity of a radio isotope affected if it undergoes a chemical change? Give a reason for your answer.
