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Question
What name is given to those isotopes which have unstable nuclei and emit various types of radiations ?
Solution
Radioactive isotopes are the isotopes that have unstable nuclei and emit various types of radiation.
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RELATED QUESTIONS
Fill in the blanks of the following statement :
An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of the atom is ___________.
State one use of radioactive isotopes in industry.
(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.
The composition of two atomic particles is given below :
| X | Y | |
| Protons : | 8 | 8 |
| Neutrons : | 8 | 9 |
| Electrons : | 8 | 8 |
(i) What is the mass number of X ?
(ii) What is the mass number of Y ?
(iii) What is the relation between X and Y ?
(iv) Which element/elements do they represent ?
According to Dalton’s Atomic Theory, atoms of the same element are identical in all respects. But according to the Modern Atomic Theory, this postulate is proved wrong. Explain.
Among the following the odd pair is
Identify the pairs which are not of isotopes?
(i) 126X, 136Y
(ii) 3517X, 3717Y
(iii) 146X, 147Y
(iv) 84X, 85Y
______ is a radioactive isotope present in our body.
U-235 Isotope is used as ______.
Isotopes of elements have the same chemical properties.
