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प्रश्न
What name is given to those isotopes which have unstable nuclei and emit various types of radiations ?
उत्तर
Radioactive isotopes are the isotopes that have unstable nuclei and emit various types of radiation.
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संबंधित प्रश्न
For the symbol H, D and T tabulate three sub-atomic particles found in each of them.
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 medicine.
Complete the following statements :
Isotopes have different mass numbers because their nuclei contain different number of ............
Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called .............
Explain why, the atomic masses of many elements are in fractions and not whole numbers.
Three different atoms of oxygen are represented as :
`""_8^16"O"`, `""_8^17"O"`, `""_8^16"O"`
(i) What do the subscripts (lower figures) and superscripts (upper figures) represent ?
(ii) What factor is responsible for the change in the superscripts 16, 17 and 18, though the element is the same ?
(iii) What is the usual name for such atoms of an element ?
(iv) Give the nuclear composition of `""_8^16"O"`.
What are isotopes?
Among the following the odd pair is
______ is a radioactive isotope present in our body.
List the uses of isotopes.
