Science / Chemistry / Vulcanization: A process of combining rubber with sulfur or other substances that causes the polymer chains to crosslink, making them stronger and more elastic. MORE
Science / Periodic Table of Elements / Boron (B): Atomic number: 5, Atomic mass: 10.81 g.mol -1, Electronegativity: 2.0, Density: 2.3 g.cm-3 at 20?°C, Melting point: 2076 ?°C, Boiling point: 3927 ?°C, Vanderwaals radius: 0.098 nm, Ionic radius: 0. MORE
Science / Periodic Table of Elements / Arsenic (As): Atomic number: 33, Atomic mass: 74.9216 g.mol -1, Electronegativity: 2.0, Density: 5.7 g.cm-3 at 14?°C, Melting point: 814 ?°C (36 atm), Boiling point: 615 ?°C (sublimation), Vanderwaals radius: 0. MORE
Science / Periodic Table of Elements / Selenium (Se): Atomic number: 34, Atomic mass: 78.96 g.mol -1, Electronegativity: 2.4, Density: 4.79 g.cm-3 at 20?°C, Melting point: 217 ?°C, Boiling point: 688 ?°C, Vanderwaals radius: 0.14 nm, Ionic radius: 0.1 MORE
Entertainment / Ice Hockey / Puck: The puck is made of vulcanized rubber, and is one inch thick and three inches in diameter and weighs between five and one-half ounces and six ounces. The rules committee must approve all pucks used in MORE
Entertainment / Literature / Polygenesis: The theory that, if two similar stories, words, or images appear in two different geographic regions or languages, they are actually unrelated to each other. Each one arose independently. For an analo MORE