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प्रश्न
Copy and complete the following table relating to the atomic structure of some elements:
| Element | Atomic Number | Mass Number | Number of protons | Number of Neutrons | Number of Electrons |
| Beryllium | 4 | 9 | |||
| Fluorine | 9 | 10 | |||
| Sodium | 12 | 11 | |||
| Aluminium | 27 | 13 | |||
| Phosphorus | 31 | 15 |
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उत्तर
| Element | Atomic Number | Mass Number | Number of protons | Number of Neutrons | Number of Electrons |
| Beryllium | 4 | 9 | 4 | 5 | 4 |
| Fluorine | 9 | 19 | 9 | 10 | 9 |
| Sodium | 11 | 23 | 11 | 12 | 11 |
| Aluminium | 13 | 27 | 13 | 14 | 13 |
| Phosphorus | 15 | 31 | 15 | 16 | 15 |
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संबंधित प्रश्न
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2,8,1 |
2,8,7 |
2,5 |
1 |
Answer the following questions based on the table above:
What is the formula of the compound formed between X and Z.
State the type of bonding in the following molecule.
Calcium oxide
How many atoms of each kind are present in the following molecule:
Calcium oxide
Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one :
State type of bond between Y and Z and give its molecular formula.
How do atoms attain noble gas configurations?
Give the orbital diagram of the following:
Methane
Explain the following:
Carbon-12 and carbon-14 both show similar chemical properties.
Identify the following reaction as either oxidation or reduction:
Zn → Zn2+ + 2e-
Match the following:
| 1. | Monoatomic gaseous atom | a. | Electrovalent bond |
| 2. | Octet rule | b. | Benzene |
| 3. | Ionic bond | c. | Water |
| 4. | Non-polar solvent | d. | Electronic theory of valence |
| 5. | Polar solvent | e. | Noble gases |
The one which is composed of all the three kinds of bond.[ionic, covalent and coordinate bond]
