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प्रश्न
State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
`""^12""_6C, ""^16""_8O, ""^19""_9F, ""^20""_10Ne, ""_13""Al""^27, ""_17""Cl""^35`
Also, draw atomic diagrams for them.
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उत्तर
| Name of elements | Atomic number | Atomic mass |
No of proton |
No of electrons |
no.of neutrons |
Electronic configuration |
| `""^12""_6C` | 6 | 12 | 6 | 6 | 6 | 2, 4 |
| `""^16""_8O` | 8 | 16 | 8 | 8 | 8 | 2, 6 |
| `""^19""_9F` | 9 | 19 | 9 | 9 | 10 | 2, 7 |
| `""^20""_10Ne` | 10 | 20 | 10 | 10 | 10 | 2, 8 |
| `""_13""Al""^27` | 13 | 27 | 13 | 13 | 14 | 2, 8, 3 |
| `""_17""Cl""^35` | 17 | 35 | 17 | 17 | 18 | 2, 8, 7 |
| Carbon `""^12""_6C` |  |
| Oxygen `""^16""_8O` |  |
| Fluorine `""^19""_9F` |  |
| Neon `""^20""_10Ne` |  |
| Aluminium `""_13""Al""^27` |  |
| Chlorine `""_17""Cl""^35` |  |
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संबंधित प्रश्न
Name the particles which actually determine the mass of an atom.
Fill in the following blanks in respect of an atom of an element
| No. of protons | No. of neutron | Mass number | Atomic number | No. of electrons | Symbol |
| 11 | 12 | ___________ | ___________ | ___________ | ________ |
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
An atom of an element has two electrons in the M shell.
What is the (a) atomic number (b) number of protons in this element?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Argon – \[\ce{^40_18Ar}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
Complete the following table.
| Atomic Number | Mass Number | Number of Neutrons | Number of Protons | Number of Electrons | Name of the Element |
| 9 | ______ | 10 | ______ | ______ | ______ |
| 16 | ______ | 16 | ______ | ______ | ______ |
| ______ | 24 | ______ | ______ | 12 | Magnesium |
| ______ | 2 | ______ | 1 | ______ | ______ |
| ______ | 1 | 0 | 1 | 1 | ______ |
Give short answer:
what is the atomic mass number? mention its formula.
When an atom gives electrons from its outermost shell, it becomes ______ charged.
The elementary particles such as protons and neutrons are collectively called ______.
