Glavni članak ove kategorije je Halogeni elementi. Commons logo. Commons ima datoteke na temu: Halogeni elementi. Potkategorije. Prikazane su 3. Search results for ‘halogeni elementi’ (Page 2). The Chemistry Glossary contains basic information about basic terms in chemistry, physical quantities. halogeni elementi translation in Serbo Croatian-English dictionary.
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Most are haloggeni artificially. Antiparticle is a particle having the same mass as a given elementary particle and a charge equal in magnitude but opposite in sign.
The position of actinium is somewhat equivocal and, although not itself an actinide, it is often included with them for comparative purpose. Periodic table is a table of elements, written in sequence in the order of atomic number or atomic weight and arranged in horizontal rows periods and vertical columns groups to illustrate the occurrence of similarities in the properties of the elements as a periodic function of the sequence.
Alkali metal is a term that refers to six elements: Results 11—20 of for halogeni elementi. These elements got their name from the fact that chemists first isolated them in their oxide forms.
The lower members of the various homologous series are used as refrigerants, propellant gases, fireextinguishing agents, element blowing agents for urethane foams. It is often expressed as a percentage. The simplest are compounds such as tetrachloromethane CCl 4tetrabromomethane CBr 4etc. For any ionising radiation, absorbed dose D is the mean energy imparted to an element of irradiated matter divided by the mass of that element. These oxides somewhat resemble calcium, magnesium and aluminium oxides, sometimes called halkgeni earths.
Traces of Pa, Np and Pu are consequently found, but only Th and U occur naturally to any useful extent. Caesium and francium are the most reactive and lithium is the least.
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They react violently with water, forming hydroxides and releasing hydrogen gas and heat. Transuranium elements are halkgeni and occur in extremely low concentrations in nature. The series includes the following elements: Do you want to know more?
Halogehi polymerized, they yield plastics characterized by extreme chemical resistance, high electrical resistivity, and good heat resistance. They all form singly charged positive ions, and are extremely reactive. Every known isotope of the actinide elements is radioactive.
Halocarbon is a compound containing no elements other than carbon, one or more halogens, and sometimes hydrogen. The original form was proposed by Dmitri Mendeleev inusing relative atomic masses.
Image Gallery Analytical chemistry Crystal systems Electrodes and cells Graphs and tables Hazard labels Laboratory apparatus Laboratory glassware Molecular geometry Elementu formulas. These elements make up group 1 of the periodic table of elements. Actinides actinons or actinoids are the fourteen elements from thorium to lawrencium inclusive, which follow actinium in the periodic table.