IME Chemistry Classes

Aufbau Principle
This principle is designated after the German term 'Aufbau,' meaning 'build up.' The Aufbau principle states that in an atom's or ion's ground state, electrons occupy lower-energy orbitals before filling higher-energy orbitals. An orbital's energy is calculated by summing the principal and azimuthal quantum numbers. According to this principle, electrons fill orbitals in the following sequence: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p…

Reaction Mechanism, when an organic molecule react in presence of attacking reagent give product such as reaction intermediate like carbocation or carboanion or free radical.

Organic molecules
Attacking reagent
1. Electrophile
2. Nucleophile
Reaction intermediate
1.carbocation
2.carboanion

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