Atomic Number (# of protons)

16

Mass (amu)

32.06

Density

2.07 g/cm³ (20⁰C, 1 atm)

Electron Configuration

[Ne]3s²p⁴

Oxidation States (bold = most stable)

+2,-2,4,6

Atomic Radius (pm)

103

Ionic Radius (pm)

(-2)184

Electronegativity

2.4

Melting Point (⁰C, 1 atm)

115

Electron Affinity (eV)

2.08

Boiling Point(⁰C, 1 atm)

445

1^st Ionization energy (eV)

10.36

Enthalpy of Fusion (kJ/mole)

1.72

2^nd Ionization Energy (eV)

Enthalpy of Vaporization (kJ/mole)

9.62

3^rd Ionization Energy (eV)

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

0.71