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Answer for the clue "Lightest of all elements ", 8 letters:
hydrogen

Alternative clues for the word hydrogen

Word definitions for hydrogen in dictionaries

Wikipedia Word definitions in Wikipedia
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of , hydrogen is the lightest element on the periodic table . Its monatomic form (H) is the most abundant chemical substance in the Universe , constituting ...

Wiktionary Word definitions in Wiktionary
n. 1 The lightest chemical element (''symbol'' H) with an atomic number of 1 and atomic weight of 1.00794. 2 Molecular hydrogen (H 2 ), a colourless, odourless and flammable gas at room temperature. 3 An atom of the element. 4 A sample of the element.

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Hydrogen \Hy"dro*gen\, n. [Hydro-, 1 + -gen: cf. F. hydrog[`e]ne. So called because water is generated by its combustion. See Hydra .] (Chem.) A gaseous element, colorless, tasteless, and odorless, the lightest known substance, being fourteen and a half ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1791, from French hydrogène , coined 1787 by G. de Morveau, Lavoisier, Berthollet, and Fourcroy from Greek hydr- , stem of hydor "water" (see water (n.1)) + French -gène "producing" (see -gen ). So called because it forms water when exposed to oxygen. Nativized ...

Usage examples of hydrogen.

After passing through the catalytic reactors, the rare hydrogen allotrope was siphoned off, while the waste gases spilled back out from the hot stacks.

Railgun launchers shot barrels of pure hydrogen ice up to a drifting ekti reactor that would catalyze the hydrogen into ekti, the valuable allotrope used as stardrive fuel.

Through catalysts and convoluted magnetic fields, the reactors converted ultrapure hydrogen into an exotic allotrope of hydrogen.

Ekti was the only known allotrope of hydrogen, though other elements had varying molecular forms.

The scoops and reactors had operated continuously for dozens of centuries, producing the hydrogen allotrope, though in recent years, it was only a token amount.

Its industrial systems were outdated and inefficient by now, but processing of the hydrogen allotrope continued.

Anyway, copious quantities of hydrogen gas were pouring from the shaft maw, coming from the rent where the unfortunate brown man had fallen into a ballonet and suffocated.

Vents on the upper surface of the ship were opening, releasing hot air from the ballonets that hung in the center of the hydrogen cells.

Margo trimmed their attitude by adjusting the amount of ordinary air contained in ballonets inside the hydrogen bag.

She felt light, as if the hydrogen in the ballonets had filled her as well.

Their own supply of breathing hydrogen, while not yet critically low, is causing them and the distant Benj more and more concern.

Treat this with excess of bisulphate of sodium, then saturate with sulphuretted hydrogen until metals are thrown down as sulphides.

This was out of respect for the human nose, for from the Diaboli, slightly so as they breathed, much more so when they spoke, there came the gentle and continuous drift of hydrogen sulfide.

Removed by oxidation of all the the hydrogen organs of of proteids, excretion, carbohydrates, but in the and fats.

May 6, 1937, in Lakehurst, New Jersey, when its hydrogen fuel burst explosively into flame, killing thirty-six people.