Question
Explain the importance of electronegativity.
✓
Answer
- When two atoms of different elements form a covalent bond, the electron pair is shared unequally.
- Electronegativity represents attractive force exerted by the nucleus on shared electrons. Electron sharing between covalently bonded atoms takes place using the valence electron.
- It depends upon the effective nuclear charge experienced by electron involved in formation of the covalent bond.
- Electronegativity predicts the nature of the bond, or, how strong is the force of attraction that holds two atoms together.
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Half life ${ }^{67} Ga$ is 78 h. How long will it take to decay $12 \%$ of sample of $Ga$ ?
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