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Count Amadeo
[ah-mah-de-aw] /ˌɑ mɑˈdɛ ɔ/ (Show IPA), 1776–1856, Italian physicist and chemist.
Historical Examples

The mental surroundings of the chemists of that age did not allow them fully to appreciate the work of Avogadro.
Heroes of Science M. M. Pattison Muir

In 1843 Charles Gerhardt proposed to use the law of Avogadro as a basis for the determination of atomic weights.
Appletons’ Popular Science Monthly, April 1900 Various

Like the atomic theory itself, Avogadro’s law is an outcome of physical work and of physical reasoning.
Heroes of Science M. M. Pattison Muir

In 1811 Avogadro distinguished between the ultimate particles of compounds and elements.
Heroes of Science M. M. Pattison Muir

According to Avogadro the water vapor contains twice as many atoms of hydrogen as of oxygen.
An Introduction to the History of Science Walter Libby

We make use of Avogadro’s law and of the definition of “atom” which has been deduced from it (see p. 142).
Heroes of Science M. M. Pattison Muir

This number, by the way, is known to science as “Avogadro’s Constant.”
Marvels of Scientific Invention Thomas W. Corbin

This deduction from Avogadro’s law is now a part and parcel of our general chemical knowledge.
Heroes of Science M. M. Pattison Muir

Avogadro’s hypothesis gave the chemist a definition of “molecule;” it also gave him a definition of “atom.”
Heroes of Science M. M. Pattison Muir

It is to the molecule, considered as the unit of physical structure, that Avogadro’s law applies.
A History of Science, Volume 4(of 5) Henry Smith Williams

Amedeo (ameˈdɛːo), Conte di Quaregna. 1776–1856, Italian physicist, noted for his work on gases
Italian chemist and physicist who formulated the hypothesis known as Avogadro’s law in 1811.


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  • Avogadro’s number

    the constant, 6.022 × 10 23 , representing the number of atoms, molecules, or ions in one mole of a substance. Symbol: N. Compare gram-atom, gram molecule. Avogadro’s number n. The number of molecules in a mole of a substance, approximately 6.0225 × 1023. Also called Avogadro’s constant. Avogadro’s number The number of atoms or […]

  • Avogadro’s law

    the principle that equal volumes of all gases at the same temperature and pressure contain the same number of molecules. Thus, the molar volume of all ideal gases at 0° C and a pressure of 1 atm. is 22.4 liters. noun the principle that equal volumes of all gases contain the same number of molecules […]

  • Avidly

    showing great enthusiasm for or interest in: an avid moviegoer. Synonyms: enthusiastic, ardent, keen; devoted, dedicated; zealous, fanatic. Antonyms: indifferent, apathetic; reluctant. extremely desirous (often followed by for or sometimes of): avid for pleasure; avid of power. Synonyms: eager; hungry, greedy, insatiable; covetous. Antonyms: disdainful, loath. Contemporary Examples However, this must be the first time […]

  • Avoid like the plague

    Evade or elude at any cost, shun. For example, Since Bob was taken into police custody, his friends have been avoiding him and his family like the plague. This seemingly modern expression dates from the Latin of the early Middle Ages, when Saint Jerome (a.d. 345–420) wrote, “Avoid, as you would the plague, a clergyman […]

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