Shielding Effect

Rarely Tested

Shielding Effect

### Formula:

$$Z_{eff}=Z-S$$

### Terminologies:

- Shielding Effect → Reduction in nuclear attraction due to presence of inner electrons.

- $$Z_{eff}$$ → Effective nuclear charge.

- S → Shielding constant.

### Usage:

- Used to explain trends in atomic size and ionization energy.

Question 1

The $$2s$$ and the $$2p$$ orbital energies of hydrogen atom are $$E_{2s}(\mathrm{H})$$ and $$E_{2p}(\mathrm{H})$$, respectively. The $$2s$$ and the $$2p$$ orbital energies of lithium atom are $$E_{2s}(\mathrm{Li})$$ and $$E_{2p}(\mathrm{Li})$$, respectively. The correct option(s) about the orbital energies is(are)

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