Understanding the scientific rationale behind Lithium's position in the periodic table:
Belongs to Group 1 (Alkali metals) because its neutral atom has a single valence electron (2s¹).
Belongs to Period 2 because its outermost electron occupies the second principal shell (n=2).
Belongs to the s-block because the differentiating electron enters the 2s subshell.
Classified as an alkali metal due to its soft metallic texture, low melting point, and electropositive cation formation (Li⁺).
Hover or tap any shell orbit ring to inspect electron counts and 2n² capacities.
Educational Note: This Niels Bohr planetary model visually illustrates principal quantum energy shells ($n=1, 2, 3\dots$) and electron counts. In modern quantum mechanics (Schrödinger model), electrons do not orbit in fixed circular planetary tracks, but exist as 3D probability clouds (orbitals: $s, p, d, f$) governed by the Heisenberg uncertainty principle.
Neutral ground state configuration. Valence electrons: 1.
Found in spodumene and petalite pegmatites, and extracted from subterranean salt-lake brines in South America and Australia.
From Greek 'lithos' meaning stone, since it was discovered in mineral ore
Highly reactive and flammable metal; reacts corrosively with moisture on skin, eyes, and mucous membranes.