element

element

An element is a substance composed of atoms with identical atomic number . The older definition of element (an element is a pure substance that can't be decomposed chemically) was made obsolete by the discovery of isotopes .

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halogeni element

화학; 일반 화학

An element of group VIIA (a. k. a. Group 18). The name means "salt former"; halogens react with metals to form binary ionic compounds. Fluorine (F), chlorine (Cl), bromine (Br), ...

organska hemija

화학; 일반 화학

The study of compounds that contain carbon chemically bound to hydrogen, including synthesis, identification, modelling, and reactions of those compounds.

nuklearna fuzija

화학; 일반 화학

Combination of two smaller nuclei to form a larger nucleus. The larger nucleus has higher binding energy per nucleon than the original nuclei, and fusion results in the release of ...

amonijak

화학; 일반 화학

Pure NH3 is a colorless gas with a sharp, characteristic odor. It is easily liquified by pressure, and is very soluble in water. Ammonia acts as a weak base . Aqueous solutions of ...

nuklearna fizija

화학; 일반 화학

Splitting of a nucleus into two smaller nuclei and neutrons. The smaller nuclei have higher binding energy than the original nucleus, and fission results in the release of energy.

enzim

화학; 일반 화학

Protein or protein-based molecules that speed up chemical reactions occurring in living things. Enzymes act as catalysts for a single reaction, converting a specific set of ...

amino kiselina

화학; 일반 화학

Amino acids are molecules that contain at least one amine group (-NH2) and at least one carboxylic acid group (-COOH). When these groups are both attached to the same carbon, the ...

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grčevi u želucu

Stanje bića - potišteno ili zlovoljano ponašanje, pojavljuju se grčevi, ili razdražljivost. Izvorno značenje ove riječi izvedena iz migrena, što znači ...