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Metallic hydrogen is a phase of hydrogen in which it behaves like an electrical conductor.This phase was predicted in 1935 on theoretical grounds by Eugene Wigner and Hillard Bell Huntington.
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). It is an icon of chemistry and is widely used in physics and other sciences.
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This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. Development of the table of chemical elements The American chemist Glenn T. Seaborg —after whom the element seaborgium is named—standing in front of a periodic table, May 19, 1950 Part of a series on the Periodic table Periodic table forms 18-column 32-column Alternative and extended ...
Hydrogen (1 H) has three naturally occurring isotopes: 1 H, 2 H, and 3 H. 1 H and 2 H are stable, while 3 H has a half-life of 12.32(2) years. [3] [nb 1] Heavier isotopes also exist; all are synthetic and have a half-life of less than 1 zeptosecond (10 −21 s).
Map of countries with proven oil reserves - according to US EIA (start of 2017) Trends in proven oil reserves in top five countries, 1980–2013 (data from US Energy Information Administration) A map of world oil reserves according to OPEC, January 2014
ISR, country code for Israel; Indiana Southwestern Railway, US; Inuvialuit Settlement Region, Northwest Territories, Canada; Ipoh-KL Sentral Route, a train service, Malaysia ...
The ISR (standing for "Intersecting Storage Rings") was a particle accelerator at CERN. It was the world's first hadron collider , and ran from 1971 to 1984, with a maximum center of mass energy of 62 GeV .