Hydrogen

Hydrogen with the chemical symbol H (from Latin: hydrogenium "water producer"; derived from Greek: ὕδωρ hydōr "water" and γίγνομαι gignomai "to become, to arise" or Latin: generare "to produce, to create") is the lightest and at the same time most common chemical element in the cosmos and accounts for an estimated 75% of the total mass of baryonic matter in the universe. In contrast, hydrogen accounts for only about 0.12% of the total mass of the Earth; in the Earth's crust, hydrogen makes up about 2.9%. Hydrogen is thus the quintessential cosmic chemical element. At -252 °C, hydrogen condenses into a colourless clear liquid, which solidifies into a crystalline solid at -259.2 °C. At high pressure of more than 1011 Pascal, metallic hydrogen is formed; this high-pressure modification has so far only been detected at very high temperatures of several thousand °K. It is assumed that metallic hydrogen occurs around the core of giant gas planets such as Jupiter.

Literature

• Rudolf Steiner: Geisteswissenschaft und Medizin, GA 312 (1999), ISBN 3-7274-3120-2 English: rsarchive.org German: pdf pdf(2) html mobi epub archive.org
• Rudolf Steiner: Geisteswissenschaftliche Grundlagen zum Gedeihen der Landwirtschaft. Landwirtschaftlicher Kursus., GA 327 (1999) English: rsarchive.org German: pdf pdf(2) html mobi epub archive.org
• Rudolf Steiner: Mensch und Welt. Das Wirken des Geistes in der Natur. Über das Wesen der Bienen, GA 351 (1999) English: rsarchive.org German: pdf pdf(2) html mobi epub archive.org

References to the work of Rudolf Steiner follow Rudolf Steiner's Collected Works (CW or GA), Rudolf Steiner Verlag, Dornach/Switzerland, unless otherwise stated. Email: verlag@steinerverlag.com URL: www.steinerverlag.com. Index to the Complete Works of Rudolf Steiner - Aelzina Books A complete list by Volume Number and a full list of known English translations you may also find at Rudolf Steiner's Collected Works Rudolf Steiner Archive - The largest online collection of Rudolf Steiner's books, lectures and articles in English. Rudolf Steiner Audio - Recorded and Read by Dale Brunsvold steinerbooks.org - Anthroposophic Press Inc. (USA) Rudolf Steiner Handbook - Christian Karl's proven standard work for orientation in Rudolf Steiner's Collected Works for free download as PDF.