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प्रश्न
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 ___________.
उत्तर
An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of an atom is 23.
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संबंधित प्रश्न
For the symbol H, D and T tabulate three sub-atomic particles found in each of them.
What name is given to the pair of atoms such as `""_7^14"N"` and `""_7^15"N"` ?
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 .............
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 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.
Define the following form:
Isotope
Give the reason why isotopes have the same chemical but different physical properties.
State true or false. If false, correct the statement.
Isotopes of an element have different atomic numbers.
Distinguish isotopes from isobar
Distinguish isotopes from isobar.
