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प्रश्न
How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?
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उत्तर
a.
CaO- 1 calcium atom + 1 oxygen atom
Cl2 - 2 chlorine atoms
H2O - 2 hydrogen atoms + 1 oxygen atom
CCl4 - 1 carbon atom + 4 chlorine atoms
b.
Ca - will donate two electrons
O - will accept two electrons
Cl - will accept one electron, so two Cl atoms will share an electron pair.
C - will accept four electrons by sharing electrons pairs with hydrogen forming covalent bonds.
H - will donate one electron by sharing an electron pair with carbon.
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संबंधित प्रश्न
Mention the basic tendency of an atom which makes it to combine with other atoms.
Explain the following briefly:
Helium does not form He2 molecule
Element X is a metal with a valency 2; Y is a non-metal with a valency 3.
(a) Write an equation to show how Y forms as ion
(b) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.
State the following is a reduction reaction or oxidation reaction.
\[\ce{Pb -> Pb^2+ + 2e-}\]
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of oxidizing agent.
Give the orbital diagram of the following:
Nitrogen
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 |
Choose the odd one out and write the reason:
Complete the following table:
| Atoms | Atomic number | Electron distribution | |
| 1. | O | 8 | ______ |
| 2. | N | ______ | ______ |
| 3. | ______ | 17 | ______ |
| 4. | ______ | ______ | 2,8,2 |
The one which is composed of all the three kinds of bond.[ionic, covalent and coordinate bond]
