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प्रश्न
Explain in brief with one example of a covalent bond
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उत्तर
The attractive force which exists due to the mutual sharing of electrons between the two atoms of similar electronegativity or having a small difference in electronegativities is called a covalent bond.
Formation of H2 molecule:
- The electronic configuration of the H atom is 1s1.
- It needs one more electron to complete its valence shell.
- When two hydrogen atoms approach each other at a certain internuclear distance, they share their valence electrons.
- The shared pair of electrons belong equally to both the hydrogen atoms. The two atoms are said to be linked by a single covalent bond and an H2 molecule is formed.
\[\ce{H. + .H->\underset{\text{shared pair of electrons}}{H:H}}\] OR H–H
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संबंधित प्रश्न
Explain the Formation of a Chemical Bond.
Write Lewis symbols for the following atoms and ions: S and S2–.
Write Lewis symbols for the following atoms and ions H and H–.
Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:-
K and S
Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:
Ca and O
Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:
Al and N
Select and write the most appropriate alternatives from the given choices.
When the following bond types are listed in decreasing order of strength (strongest first). Which is the correct order?
Draw Lewis dot diagram for the following.
Hydrogen (H2)
Draw Lewis dot diagram for the following.
Water (H2O)
Draw Lewis dot diagram for the following.
Lifthium Fluoride (LiF)
Draw Lewis electron dot structure of HF
Draw Lewis electron dot structure of C2H4
Draw Lewis electron dot structure of SO2
Which of the following molecules has a central atom with complete octet?
____________ is an example of molecule with expanded octet.
Which of the following is INCORRECT with respect to enthalpy?
In which of the following, the central atom does NOT have lone pair(s) of electrons?
The condensed electronic configuration [Ne] 3s2 3p5 denotes the element ____________.
What is the formal charge on hydrogen atom in water molecule?
Assertion (A): Sodium chloride formed by the action of chlorine gas on sodium metal is a stable compound.
Reason (R): This is because sodium and chloride ions acquire octet in sodium chloride formation.
