Destination Information

Elemental symbol: He Atomic number: 2 Group: Noble Gasses Stable Isotopes: 4 He (common helium), 3 H Some Radioactive Isotopes: 5 He, 6 He, 7 He, 8 He, 9 He, 10 He Some Allotropes: N/A Melting point: 0.95K at 25 atmospheres of pressure (helium will not solidify under normal pressure) Boiling point: 4.222K, -268.928°C, or -452.07°F State at room temperature (20°C/68°F): Gas Density: 0.1785 g/l Common compounds: N/A Discovered by: Sir William Ramsey independently from Per Teodor Cleve and Nils Abraham in 1896 Helium is the second most abundant element in the universe, accounting for about 24% of the universe. Helium is also very unreactive, a property that companies use. It is used in welding, and in blanketing highly reactive substance. ‘Blanketing’ is done by keeping a substance from reacting by surrounding it by an nonreactive substance. Helium does not make compounds in nature. Like hydrogen, helium is light enough to escape Earth’s gravity, but it can be ...

Elemental symbol: H Atomic number: 1 Group: Alkali metals, halogens, or it’s own group.  Stable Isotopes: Protium/ 1 H (normal hydrogen), Deuterium/Heavy Hydrogen/ 2 H Some Radioactive Isotopes: Tritium/ 3 H (half-life: 12.5 years) Some Allotropes: Dihydrogen Melting point: 13.99 K, -259.16°C, or -434.49°F Boiling point: 20.271 K, -252.879°C, or -423.182°F State at room temperature (20°C/68°F): Gas Density: 0.000082 g/cm 3 (grams per cubic centimeter) Common compounds: water (H 2 O), sucrose/table sugar (C 12 H 22 O 11 ), ammonia (NH 3 ), methane (CH 4 ) and many more… Discovered by: Henry Cavendish in 1766 Hydrogen is the most abundant element in the universe, making up for about 75% of the universe by weight. Hydrogen is also a major part of your existence. While hydrogen helps make up many compounds that make up you, the Sun can only function with hydrogen. The Sun, along with other stars, fuse hydrogen together to make helium (He) during their main sequ...

Allotrope Merrian-Webster.com states that an allotrope is “a form showing allotropy.” So, what does allotropy mean? According to Merrian-Webster.com, it means: “the existence of a substance and especially an element in two or more different forms (as of crystals) usually in the same phase.” That doesn’t make that much sense to me. An allotrope is an element, but in a different form. The difference is in the structure of the substance. For example, both diamond rings and graphite (the stuff in pencils) are made out of pure carbon. Diamond is a cubic crystallization of carbon while graphite is a hexagonal crystallization of carbon. Different allotropes can be different from each other. Their melting or boiling point may be higher or lower, one might be more prone to exploding, it just depends.  Compound In chemistry, a compound is a combination of two or more elements. It’s a more specific then that though. A mixture and a compound are two different things. A mixture ...