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It was accordingly put to a new use to indicate the open long e which had arisen through alteration of the primitive Greek long a. In a few inscriptions from Thera, Naxos, and several other localities the letter was used with syllabic value; that is, it included he, thus showing its old consonantal and its new vocalic value at the same time. Eventually, as a result of the spread of the Ionic alphabet, its use for the long vowel e or η became general throughout Greece, while its consonantal value as the aspirate h passed from the western Greek alphabets into the Etruscan alphabets and then into the Latin and other alphabets of ancient Italy. In the Romance languages the sound has largely disappeared, but the letter is still extensively used, partly with only etymological value, (e.g., French homme), partly with fancied etymological value (e.g., French haut from Latin altus, with h through the influence of hoh, the Old High German word of the same meaning), partly with special orthographical functions.
Spanish
For example, in the solar wind they interact with the Earth's magnetosphere giving rise to Birkeland currents and the aurora. Phoenician and proto-Semitic languages are the earliest recorded alphabets that use symbols to represent sounds rather than to represent things like Egyptian hieroglyphics. (Greek is considered the first true alphabet because it uses symbols to represent both consonant and vowel sounds). In proto-Semitic, the letter H was also the word for thread or fence, and if you look at the letter H, it is still clear that it looks like a portion of a fence. The letter is silent in a syllable rime, as in ah, ohm, dahlia, cheetah, pooh-poohed, as well as in certain other words (mostly of French origin) such as hour, honest, herb (in American but not British English) and vehicle (in certain varieties of English). Initial /h/ is often not pronounced in the weak form of some function words including had, has, have, he, her, him, his, and in some varieties of English (including most regional dialects of England and Wales) it is often omitted in all words (see '⟨h⟩'-dropping).
Meanings for H[change change source]
The electrolysis of water is a conceptually simple method of producing hydrogen. The uppercase letter for H is H and the lowercase letter for H is h. The letter’s name is "haitch" (/ˈheɪtʃ/), also known as simply "'aitch" (/ˈeɪtʃ/). Sandra Liebenberg, Distinguished Professor and H F Oppenheimer Chair in Human Rights Law, Stellenbosch UniversityThis article is republished from The Conversation under a Creative Commons license. In pre-modern Maltese, h still produces the sound [h] as recorded by Agius de Soldanis (1750) and Mikel Anton Vassalli (1796).
Derived terms
In the quantum mechanical treatment, the electron in a ground state hydrogen atom has no angular momentum at all—illustrating how the "planetary orbit" differs from electron motion. In the early Greek alphabets a form with three horizontal bars and the simpler form H were both widely distributed. In Etruscan the prevailing form was similar to the early Greek form, and the same or a similar form occurs in very early Latin inscriptions, but the form H came into general use in Latin, either from the Chalcidic Greek alphabet of Cumae or from some other source. The cursive Latin form resembled a stylized version of the modern minuscule h, as did the uncial form.
In other languages
The thermodynamic basis of this low reactivity is the very strong H–H bond, with a bond dissociation energy of 435.7 kJ/mol.[26] The kinetic basis of the low reactivity is the nonpolar nature of H2 and its weak polarizability. It spontaneously reacts with chlorine and fluorine to form hydrogen chloride and hydrogen fluoride, respectively.[27] The reactivity of H2 is strongly affected by the presence of metal catalysts. Thus, while mixtures of H2 with O2 or air combust readily when heated to at least 500 °C by a spark or flame, they do not react at room temperature in the absence of a catalyst.
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Hence hydrogen is often used as a theoretical model for more complex atoms, and the results are applied qualitatively to other atoms. These differ in the magnetic interactions of the protons due to the spinning motions of the protons. In ortho-hydrogen, the spins of both protons are aligned in the same direction—that is, they are parallel. In para-hydrogen, the spins are aligned in opposite directions and are therefore antiparallel. The relationship of spin alignments determines the magnetic properties of the atoms. Normally, transformations of one type into the other (i.e., conversions between ortho and para molecules) do not occur and ortho-hydrogen and para-hydrogen can be regarded as two distinct modifications of hydrogen.
Words That Start With H
Hydrogen is a chemical element; it has symbol H and atomic number 1. It is the lightest element and, at standard conditions, is a gas of diatomic molecules with the formula H2, sometimes called dihydrogen,[11] but more commonly called hydrogen gas, molecular hydrogen or simply hydrogen. It is colorless, odorless, tasteless,[12] non-toxic, and highly combustible. Constituting approximately 75% of all normal matter, hydrogen is the most abundant chemical substance in the universe.[13][note 1] Stars, including the Sun, primarily consist of hydrogen in a plasma state, while on Earth, hydrogen is found in water, organic compounds, and other molecular forms. The most common isotope of hydrogen (symbol 1H) consists of one proton, one electron, and no neutrons. Paracelsus, physician and alchemist, in the 16th century unknowingly experimented with hydrogen when he found that a flammable gas was evolved when a metal was dissolved in acid.
This is because ⟨j⟩ and ⟨v⟩ used to be considered variants of ⟨i⟩ and ⟨u⟩ respectively. ⟨h⟩ also appears in the digraph ⟨ch⟩, which represents /tʃ/ in Spanish and northern Portugal, and /ʃ/ in varieties that have merged both sounds (the latter originally represented by ⟨x⟩ instead), such as most of the Portuguese language and some Spanish dialects, prominently Chilean Spanish. The Table lists the important properties of molecular hydrogen, H2.
See the Silesian language article on Wikipedia for more, and h for development of the glyph itself. In Irish, ⟨h⟩ is not considered an independent letter, except for a very few non-native words, however ⟨h⟩ placed after a consonant is known as a "séimhiú" and indicates lenition of that consonant; ⟨h⟩ began to replace the original form of a séimhiú, a dot placed above the consonant, after the introduction of typewriters. Its most important uses are in the digraphs 'ch' /k/ and 'gh' /ɡ/, as well as to differentiate the spellings of certain short words that are homophones, for example some present tense forms of the verb avere ('to have') (such as hanno, 'they have', vs. anno, 'year'), and in short interjections (oh, ehi).
Consequently, kinetic energy is distributed faster through hydrogen than through any other gas; it has, for example, the greatest heat conductivity. Elementary hydrogen finds its principal industrial application in the manufacture of ammonia (a compound of hydrogen and nitrogen, NH3) and in the hydrogenation of carbon monoxide and organic compounds. Hydrogen is commonly used in power stations as a coolant in generators due to a number of favorable properties that are a direct result of its light diatomic molecules. These include low density, low viscosity, and the highest specific heat and thermal conductivity of all gases.
The early contemporary variant was first found in the dialect of lsien tal-bliet (“tongues of the cities”, referring to the cities around the Grand Harbour according to Vassalli) which eventually superceded the increasingly archaic [h] sound in the neighborhing areas.
The two forms may, however, interconvert under certain conditions. Equilibrium between the two forms can be established in several ways. One of these is by the introduction of catalysts (such as activated charcoal or various paramagnetic substances); another method is to apply an electrical discharge to the gas or to heat it to a high temperature. In Spanish and Portuguese, ⟨h⟩ is a silent letter with no pronunciation, as in hijo [ˈixo] ('son') and húngaro [ˈũɡaɾu] ('Hungarian'). In words where the ⟨h⟩ is derived from a Latin /f/, it is still sometimes pronounced with the value [h] in some regions of Andalusia, Extremadura, Canarias, Cantabria, and the Americas. Some words beginning with [je] or [we], such as hielo, 'ice' and huevo, 'egg', were given an initial ⟨h⟩ to avoid confusion between their initial semivowels and the consonants ⟨j⟩ and ⟨v⟩.
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