Atomic Number (# of protons)

13

Mass (amu)

26.98

Density

2.70 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Ne]3s²p¹

Oxidation States (bold = most stable)

+3

Atomic Radius (pm)

143

Ionic Radius (pm)

(+3)54

Electronegativity

1.5

Melting Point (⁰C, 1 atm)

661

Electron Affinity (eV)

0.44

Boiling Point(⁰C, 1 atm)

2520

1^st Ionization energy (eV)

5.99

Enthalpy of Fusion (kJ/mole)

10.67

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

293.7

3^rd Ionization Energy (eV)

Specific Heat Capacity ( J/ (g K), 25⁰C, 1 atm)

0.90