1. the valence electrons in nitrogen experience the 2 charge of the nucleus through the shield of core electrons. 2. the shielding experienced by any one of the valence electrons resulting from the core electrons is nearly nearly 6+. 3. for the 2s electrons, the shielding from the other 2s electron is nearly zero. 4. for the 2p electrons, the shielding from the other 2s electron is slightly greater than 5+. 5. therefore, the effective nuclear charge would be 6+. 6. the effective nuclear charge felt by the 2s electrons would be greater than the effective nuclear charge felt by the 2p electrons.