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प्रश्न
Define the following form:
Isotope
उत्तर
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
संबंधित प्रश्न
Isotopes of an element have ______.
What name is given to those isotopes which have unstable nuclei and emit various types of radiations ?
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 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 ?
Four elements A, B, C, D are given :
- A shows the presence of 20 neutrons, 17 protons and 17 electrons.
- B shows the presence of 18 neutrons, 17 protons and 17 electrons.
- C shows the presence of 10 neutrons, 9 protons and 10 electrons.
- D shows the presence of 4 neutrons, 3 protons and 2 electrons.
State which of the above is –
- an anion
- a cation
- a pair of isotopes.
Write the formula of the compound formed between D and C.
State true or false. If false, correct the statement.
Isotopes of an element have different atomic numbers.
______ isotope is used in the nuclear reactors.
Name the radioactive isotope used to find the age of fossils. Name the radioactive radiation which it emits?
______ is a radioactive isotope present in our body.
U-235 Isotope is used as ______.
