Gallium · Ga Gallium
is used in compound semiconductors, optoelectronic devices and low melting point alloys.
- atomic number / Atomic number
- 31
- atomic weight / Atomic mass
- 69.723 u
- Family/Group
- 13
- Period · Block / Period · Block
- 4 · p
- Category / Category
- post-transition metal · Post-transition metal
- State / State
- solid state
- Electron configuration
- [Ar]4s2 3d10 4p1
- Oxidation states / Oxidation states
- +3
- Electronegativity / Electronegativity
- 1.81（Pauling）
- Density / Density
- 5.91 g/cm³
- Melting point / Melting point
- 302.91 K
- Boiling point / Boiling point
- 2477 K
- Atomic radius / Atomic radius
- 187 pm（van der Waals）
- First ionization energy
- 5.999 eV
- Discovery year / Discovery
- 1875
attribute description and data source
properties taken from PubChem periodic table snapshot (2026-10-04). Atomic weights may be reference values or representative isotope masses and cannot be considered exact constants for all samples; density, phase transition points, and phase states depend on temperature, pressure, and allotropes. The solidification of helium requires pressure. Some properties of radioactive and superheavy elements are predicted values, and missing items are marked as not included. Please check the original source and experimental conditions for precise calculations.