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प्रश्न
Name the radioactive isotope used to find the age of fossils. Name the radioactive radiation which it emits?
उत्तर
Carbon-14 is a radioactive isotope which is used to find the age of fossils. It is Beta (β) radiation. When Carbon-14 emits a beta particle, it becomes Nitrogen-14.
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संबंधित प्रश्न
(a) What are radioactive isotopes ? Give two examples of radioactive isotopes.
(b) Give any two uses of radioactive isotopes.
(c) An element Z contains two naturally occurring isotopes `""_17^35"Z"` and `""_17^37"Z"`. If the average atomic mass of this element be 35.5 u, calculate the percentage of two isotopes.
In a sample of ethyl ethanoate (CH3COOC2H5), the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it ?
The isotopes of an element contain :
Which of the following pairs are isotopes ? Give reasons for your choice :
(i) `""_26^58"A"`, `""_28^58"B"` or (ii) `""_35^79"X"`, `""_35^80"Y"`
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.
Name the atoms of a substance having same atomic number, but different mass numbers. Give one example of such a substance. How do the structures of such atoms differ?
Give the reason why isotopes have the same chemical but different physical properties.
Isotopes of elements have the same chemical properties.
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.
