Understanding the scientific rationale behind Nickel's position in the periodic table:
Belongs to Group 10 because it has 10 valence electrons (3d⁸ 4s²).
Belongs to Period 4 because its outermost electrons occupy n=4.
Belongs to the d-block because its valence electrons occupy the 3d subshell.
Classified as a transition metal with notable ferromagnetism and corrosion resistance.
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: 10.
Mined from magmatic sulfide ores (pentlandite) and laterite deposits in Indonesia, the Philippines, and Russia.
From German 'Kupfernickel' meaning devil's copper, so called because miners could not extract copper from it
Nickel is a prevalent contact allergen causing allergic contact dermatitis (nickel itch) from jewelry and belt buckles.