30Zinc

Zinc is a transition metal in group 12, period 4. At 25 °C it is a solid.

Shells: 2, 8, 18, 2. A simple picture: electrons do not move in circles.

Symbol: Zn
Atomic number: 30 protons in the nucleus
Standard atomic weight: 65.38 ± 0.02The isotope mix varies in normal samples, so the value cannot be given more precisely.
Electron configuration: [Ar] 3d¹⁰ 4s²
Electrons in each shell: 2, 8, 18, 2
Group, period, block: 12, 4, d
Family: Transition metals
State at 25 °C: solid
Electronegativity: 1.65 (Pauling scale)
First ionisation energy: 906.4 kJ/mol (9.394197 eV)

Where these numbers come from

Atomic weight: IUPAC CIAAW, abridged standard atomic weights 2024. Electron configuration and ionisation energy: NIST Atomic Spectra Database. Family, state and electronegativity: PubChem. See Sources. Melting points, boiling points and densities are left out for now: published values differ between sources, and we will add them once each has been checked.