Page 1: Electron Shell Configuration and Subshell Organization

The page explains the fundamental concepts of atomic electron arrangement and configuration methods. The content covers both powłoki elektronowe (electron shells) and podpowłoki elektronowe (electron subshells), detailing their organization and notation systems.

Definition: Electron shells are regions around an atomic nucleus where electrons are arranged in specific energy levels, labeled as K, L, M, N, O, P, Q.

Highlight: The number of electron shells in an atom equals the period number of the element in the periodic table.

Example: The konfiguracja powłokowa siarki (sulfur's shell configuration) is written as K²L⁸M⁶, while its subshell configuration is 1s², 2s²2p⁶, 3s²3p⁴.

Vocabulary: Subshells (podpowłoki) are designated by lowercase letters (s, p, d, f) and represent different energy states within main shells.

Definition: The shortened electron configuration uses noble gas notation in square brackets, followed by the valence shell configuration. For example, sulfur's shortened configuration is [Ne]3s²3p⁴.

The page emphasizes that electrons first occupy the lowest energy subshells closest to the atomic nucleus, following the Aufbau principle. This systematic approach to electron arrangement helps explain chemical properties and bonding behavior of elements.