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en.wikipedia.org/wiki/Hydrogen

Hydrogen is a chemical element with chemical symbol H and atomic number 1. With a standard atomic weight of circa 7000100800000000000♤1.008, ...

www.rsc.org/periodic-table/element/1/hydrogen

Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1.008. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

education.jlab.org/itselemental/ele001.html

The Element Hydrogen - Basic Physical and Historical Information.

www.chemicalelements.com/elements/h.html

Hydrogen at Chemical Elements.com. Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page. Basic Information. Name: Hydrogen

www.livescience.com/28466-hydrogen.html

Jan 23, 2015 ... The most abundant element in the universe, hydrogen is also a promising source of "clean" fuel on Earth. Named after the Greek words hydro ...

www.ducksters.com/science/chemistry/hydrogen.php

Kids learn about the element hydrogen and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics ...

www.thoughtco.com/hydrogen-element-facts-606474

Mar 7, 2017 ... Here are 10 hydrogen facts that cover the most interesting and important features of the first element of the periodic table.

www.webelements.com/hydrogen

This WebElements periodic table page contains the essentials for the element hydrogen.

www.chemicool.com/elements/hydrogen-facts.html

Here are 12 interesting facts about hydrogen, the simplest and commonest element in the universe. You can find out much more on our main hydrogen page . 1.