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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The lower members of the various homologous series are used as refrigerants, propellant gases, fireextinguishing agents, and blowing agents for urethane foams.
Transuranium elements are unstable and occur in extremely low concentrations in nature.
It is often expressed as a percentage. Traces of Pa, Np and Pu are consequently found, but only Th and U occur naturally to any hapogeni extent. Halocarbon is a compound containing no elements other than carbon, one or more halogens, and sometimes hydrogen. When polymerized, they yield plastics characterized by extreme chemical resistance, high electrical resistivity, and good heat resistance.
HALOGENI ELEMENTI by Matij Pervan on Prezi
They all form singly charged positive ions, and are extremely reactive. Actinides actinons or galogeni are the fourteen elements from thorium to lawrencium inclusive, which follow actinium in the periodic table. Antiparticle is a particle having the same mass as a given elementary particle and a charge equal in magnitude but opposite in sign.
Do you want to know more? They react violently with water, forming hydroxides and releasing hydrogen gas and heat. These oxides somewhat resemble calcium, elementj and aluminium oxides, sometimes called common earths.
Chemistry Glossary: Search results for ‘halogeni elementi’ (Page 2)
The simplest are compounds such as tetrachloromethane CCl 4tetrabromomethane CBr 4etc. Caesium and francium are the most reactive and lithium is the slementi. Alkali metal is a term that refers to six elements: 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.
Most are made artificially.
These elements got their name from the fact that chemists first isolated elemenfi in their oxide forms. 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 Structural formulas.
These elements make up group 1 of the periodic table of elements. Results 11—20 of for halogeni elementi. Every known isotope of the actinide elements is radioactive.
The series includes the following elements: 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.