Allotrope

Science / Chemistry / Allotrope: Some elements occur in several distinct forms called allotropes. Allotropes have different chemical and physical properties. For example, graphite and diamond are allotropes of carbon.
Search Google for Allotrope:

Sulfur (S)

Science / Periodic Table of Elements / Sulfur (S): Atomic number: 16, Atomic mass: 32.06 g.mol -1, Electronegativity: 2.5, Density: 2.07 g.cm -3 at 20 ?°C, Melting point: 113 ?°C, Boiling point: 445 ?°C, Vanderwaals radius: 0.127 nm, Ionic radius: MORE

Gallium (Ga)

Science / Periodic Table of Elements / Gallium (Ga): Atomic number: 31, Atomic mass: 69.72 g.mol -1, Electronegativity: unknown, Density: 5.1 g.cm-3 at 20?°C, Melting point: 29.8 ?°C, Boiling point: 2204 ?°C, Vanderwaals radius: 0.161 nm, Ionic radiu MORE

Polymorph

Science / Chemistry / Polymorph: Solid substances that occur in several distinct forms. Polymorphs have different chemical and physical properties. Allotropes are polymorphs of elements. MORE