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Due to screening effect of electrons in ...

Due to screening effect of electrons in an atom

A

`IE` decreases

B

`IE` increases

C

No change in `IE`

D

Attraction of nucleus on the valence electron increases

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Screening Effect**: - The screening effect, also known as the shielding effect, occurs in multi-electron atoms where inner electrons repel outer electrons. This repulsion reduces the effective nuclear charge felt by the outer electrons. 2. **Effect on Ionization Energy (IE)**: - Ionization energy is the energy required to remove an electron from an atom. Due to the screening effect, the outer electrons experience a reduced attraction to the nucleus because of the repulsion from the inner electrons. 3. **Conclusion on Ionization Energy**: - Since the outer electrons are less tightly held by the nucleus due to the screening effect, it requires less energy to remove them. Therefore, the ionization energy decreases. 4. **Final Answer**: - The correct option is that the ionization energy (IE) decreases due to the screening effect of electrons in an atom.
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