Allotropes

Existence of the elements in two or more forms, or different molecular configurations. For example, phosphorus exists as white phosphorus (P4) or red phosphorus (P8).

Alótropos. Allotropes

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Chemical Glossary Terms

Chemical Terms begining with A

Absorption.

Penetration or impregnation of a solid material by a liquid or a gas. The absorption of light consis...

Particle accelerator.

Machine designed to accelerate charged particles to a suitable energy to bomb a target and cause nuc...

Electron acceptor

Atom or group of atoms that receives a pair of non-shared electrons to form a coordinated covalent b...

Proton acceptor

Atom or set of atoms capable of receiving a proton of a substance that gives it up. According to Lew...

Ethyl acetate

Volatile liquid called ethyl ethanoate in the systematic nomenclature. It has a pleasant fruity smel...

Acetylene

Colorless and toxic gas, called etino. Its combustion is very exotic and the flame obtained sores at...

Acetone

Organic compound, simpler and the most important of ketones, called propanone. It is a colorless liq...

Acidity (degree of ..)

Excess hydrogen ions (H +) or hydronium ions (H3O +) in an aqueous solution in relation to those con...

Acid

Substance composed of metalloid and hydrogen (hydrazides) or also of metalloid, oxygen and hydrogen ...

Hydrofluoric acid (fluoride + hydroxide)

HF (hydrogen fluoride) is a colorless, poisonous and strongly fuming liquid. Normal boiling point at...

Acidic acid

Colorless liquid, called ethanoic acid in the systematic nomenclature. It is present in vinegar, to ...

Acetylsalicylic acid

Organic compound derived from salicylic acid. It is a drug that is used against pain and rheumatism;...

Ascorbic Acid

Organic compound that appears as a white powder very soluble in water, with an acidic flavor. It is ...

benzoic acid

Organic acid crystallizes in white needle forms soluble in ethanol and ether and melts at 122.5 ° C...

Bromhydric acid

Aqueous solution of bromine hydride, HBr. The? Bromide acid acts as a strong acid and is commerciali...

Briquetic acid

It is a very strong acid that can not be prepared in concentrated solutions, since it tends to decom...

Butenodioic acid

Compound with a double bond and two carboxylic groups. The double enlce presents a geometric isomer?...

Butter-rich acid

Oily liquid with a stale oil odor, is present in butter and is obtained by fermentation of glycides ...

Hydrocyanic acid

Dissolution of hydrogen cyanide HCN, in water. It is a colorless liquid that gives off the smell of ...

Cyanic acid

Chemical compound of HOCN formula. It appears as a colorless, toxic, volatile and very unstable liqu...

Conjugated acid.

Substance that results from adding a proton (H3O +) to a base. The NH4 + ion is the conjugate acid o...

Ethanoic acid

It is a crystalline solid, soluble in water, alcohol and ether. It is obtained insdustrially by heat...

Formic acid

carboxylic acid, the simplest, called methanoic acid. The acidic acid is found in ants, nettles and ...

Phosphoric acid

Oxo-acid of phosphorus, strictly speaking, the designation of phosphoric acid encompasses all oxo-ac...

Oleic acid

Long chain unsaturated fatty acid that is part of fats and oils. It is the main component of olive o...

palmitic acid

Saturated fatty acid that is part of fats and oils. It is found in butter and lard, so? as in coconu...

Pentanoic acid

Monocarboxylic acid found in valerian oil. It is a colorless liquid, of penetrating smell and flavor...

Pyruvic acid

The simplest of the keto acids, it is a solid that melts at 13.5ºC and is soluble in water, alcohol...

Propanoic acid

Monocarboxylic acid. It is a colorless liquid with penetrating odor, soluble in water, alcohol, chlo...

Salicylic acid

Aromatic carboxylic acid that appears in the form of colorless needles with a bitter taste, soluble ...

Thiocyanic acid

Chemical compound of formula HSCN. It is a white crystalline solid, soluble in water, and with stron...

Uric acid

Final product of the purine metabolism in man and other vertebrates, it is a crystalline, colorless ...

Hydrochloric acid

Aqueous solution of hydrogen iodide, HI, is a pale yellow gas, dense and toxic, which forms a yellow...

Acid, according to BrÃ¶nsted-Lowry.

It is a chemical species that donates hydrogen ion or that yields one proton to another.

Actinides

Set of elements that constitute the second series of internal transition. It goes from thorium to la...

Actinium

Chemical element of Ac symbol, belonging to group 3 of the periodic table, of atomic number 89 and a...

Activation of neutrons.

Submit any substance to the bombardment of neutrons in a nuclear reactor or a neutron source. Activa...

Radioactive activity

Number of nuclear disintegrations per unit of time. The most common unit of reactivity is the curie ...

Adrenalin

Hormone secreted by the adrenal medulla. The secretion of adrenaline in the blood causes a series of...

Adsorption.

It occurs when a gas is deposited on the surface of a solid by weak Van der Waals bonds. Activated c...

Electronic affinity

Energy absorbed or released when a neutral atom of an element is a gaseous state captures an electro...

Complexing agent.

Anion or molecule that binds to an atom of a metal to form a complex ion. Examples of complexing age...

Chelating agent

Ligand of a complex ion that can form more than one bond with the central ion. Ethylenediamine can f...

Tensoactive agent.

Chemical product that is added to detergents to decrease the surface tension to reduce the adhesion ...

Distilled water

Pure water obtained through the process of distillation of impure water or water containing dissolve...

Heavy water

Common name of deuterium oxide, it is a denser liquid than water and chemically active; It is used i...

Water regia

Mixture of nitric acid and hydrochloric acid in a ratio of 1 to 3. It is a very energetic oxidant. I...

Mother waters

Solution in which a precipitate is originally obtained. It is separated from its mother liquors by f...

Insulating.

Material that has the property of preventing the loss of heat or electricity. It also refers to the ...

Alkali or base, according to BrÃ¶nsted-Lowry

It is a chemical species accepting the hydrogen ion or accepting one proton from another.

Alcalimetry

Volumetric analysis method that allows the quantitative assessment of an acid by neutralization with...

Alkaline

Family of elements belonging to group IA of the periodic table, with the exception of hydrogen. Reac...

Alkaline-earth

Family of elements belonging to group IIA of the periodic table. They have properties like those of ...

Ãlcalis

Substances that possess the OH- functional group, responsible for the basic characteristics of such ...

Alkanes

Set of simpler organic compounds formed by carbon and hydrogen. They are said to be saturated becaus...

Alcohols

Organic compounds that have a hydroxyl group attached to a carbon atom. They have higher boiling poi...

Aldehyde

Organic compounds that have group -CH = O linked to another carbon atom. They are the first oxidatio...

Alloy.

Mix of metals after being melted. Brass is an alloy of copper and zinc, copper and tin bronze. They ...

Aliquot.

Volume of liquid that corresponds to a known fraction of a larger volume.

Starch (from lat. V. Amidum and this from gr .amylon).

Gluccido polysaccharide (C6H10O5) x, is split into amylose (soluble in water in low concentrations) ...

Alotropy (alo- + -tropy)

Property of some chemical elements to present more than one solid phase (crystalline form) for examp...

Allotropes

Existence of the elements in two or more forms, or different molecular configurations. For example, ...

Alquenos

Hydrocarbons that have one or more carbon-carbon double bonds in their molecule are named like alkan...

Alquinos

Hydrocarbons that contain one or more triple bonds. They are named as the alkanes of the same number...

Aluminum

Chemical element of symbol Al, belonging to group 13 of the periodic table, of atomic number 13 and ...

Amalgam

Mercury alloy with another metal. Mercury forms amalgams with almost all metals except iron and thes...

Amethyst

Chemical element of Am symbol, belonging to the series of actinides of atomic number 95. is a radioa...

Amides

Compounds derived from carboxylic acids in which the -OH group has been replaced by -NH2. the nomenc...

Amines

Organic compounds derived from ammonia by replacing one or more hydrogen atoms with organic groups. ...

Amino acid

Basic structural unit of proteins. An amino acid consists of an amino group, a carboxyl group, a hyd...

Ammonia

Chemical compound of formula NH3. It is a colorless gas with a characteristic odor. It is corrosive ...

Qualitative analysis

Branch of analytical chemistry that studies the nature of the components of a mixture or a substance...

Quantitative analysis

Branch of analytical chemistry that studies the composition of a mixture or a substance. The result ...

Volumetric analysis

Quantitative analysis technique consisting of the experimental measurement of the volumes involved i...

Analyte

Species or species of a sample that will be the subject of a chemical analysis.

AnfÃgenos

Denomination of all the elements of group 16 of the periodic table, also called chalcogens. They are...

Amphiprotism.

Property that some electrolytes have to act as acids or bases; it is also called amphotericism. The ...

Amphitheater

Compound that can react tanco with an acid as with a base, that is to say, that can act like base or...

Angstrom.

Unit of measurement that is equivalent to ten millionth of a millimeter. It is used to measure wavel...

Anhydride

Name, currently in disuse, with which it designates the oxides of non-metallic elements. It is used ...

Anhydrous

Solid substance that has lost all the water of crystallization. It is mainly applied to salts.

Aniline

Oily and colorless liquid with a characteristic odor, containing phenylamine. It is poorly soluble i...

Anion.

Chemical species negatively charged because it has excess electrons. The anions are attracted by the...

Antibiotic

Chemical substance capable of inhibiting the growth of microorganisms or eliminating them. It usuall...

Antimony

Chemical element of symbol Sb, belonging to group 15 of the periodic table, of atomic number 51 and ...

Antioxidant

Substance that reduces the oxidation rate of easily oxidizable bodies. The most important are aromat...

Anthracene

Tricyclic aromatic hydrocarbon. It is solid at room temperature, insoluble in water and soluble in o...

Arsenic

Chemical element of symbol As, belonging to group 15 of the periodic table, of atomic number 33 and ...

Asbestos

Impure magnesium, calcium, sodium and iron silicate. Formed by amphibole such as tremolite, antopili...

Assimilation of nitrogen.

Process of transformation of inorganic nitrogen (nitrates, nitrites or ammonia) to incorporate it in...

Astatus

Chemical element of symbol At, belonging to group 17 of the periodic table, of atomic number 85 and ...

Ionized atom.

Atom that has lost or gained one or more electrons. When it gains electrons, an anion is formed, and...

Atom.

The smallest unit of a chemical element, consisting of a central core surrounded by orbital electron...

Autocatalysis

Phenomenon that occurs when one of the products of certain chemical reactions acts as a catalyst for...

AutoprotÃ³lisis.

Ionization process of the molecules of a solvent. The reaction of water self -protoisis is: 2 H2O H3...

Azeotrope

Liquid mixture whose boiling point is constant. At the azeotropic point, the composition in the vapo...

Sulfur (lat. Sulphure).

Chemical element, non-metallic yellow, solid, brittle; It is native to volcanic areas and combined f...

Allotropes

Chemical Glossary Terms

Chemical Terms begining with A

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