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प्रश्न
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 .............
उत्तर
Isotopes have different mass numbers because their nuclei contain different number of neutrons.
Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called isotopes.
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संबंधित प्रश्न
Explain why, the atomic masses of many elements are in fractions and not whole numbers.
Atom A has a mass number 209 and atomic number 82.
Atom B has a mass number 209 and atomic number 83.
(i) How many protons atom A has ?
(ii) How many protons atom B has ?
(iii) Are atoms A and B isotopes of the same element ?
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.
Among the following the odd pair is
______ 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?
The isotope was used to remove the brain tumor and treatment of Cancer in ______.
U-235 Isotope is used as ______.
Distinguish isotopes from isobar
