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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Actinides actinons or actinoids are the fourteen elements from thorium to lawrencium inclusive, which follow actinium in the periodic table.
HALOGENI ELEMENTI by on Prezi
These elements got their name from the fact that chemists first isolated them in their oxide forms. These elements make up group 1 of the periodic table of elements. It is often expressed as a percentage.
The original form was proposed by Dmitri Mendeleev inusing relative atomic masses. The series includes the following elements: Image Gallery Analytical chemistry Crystal systems Electrodes and cells Graphs and tables Hazard labels Laboratory apparatus Laboratory glassware Molecular geometry Structural formulas.
Most are made artificially.
Chemistry Glossary: Search results for ‘halogeni elementi’ (Page 2)
The lower members of the various homologous series are used as refrigerants, propellant gases, fireextinguishing agents, and blowing agents for urethane foams.
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? Traces of Pa, Np and Haloveni are consequently found, but only Th and U occur naturally to any useful extent. The position of actinium is somewhat equivocal and, although not itself an actinide, it is often included with them for comparative purpose.
When polymerized, they yield plastics characterized by extreme chemical resistance, high electrical resistivity, and good heat resistance. 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.
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 halognei. Alkali metal is a term that refers to six elements: Results 11—20 of for halogeni elementi. They all form singly charged positive ions, and are extremely reactive. Transuranium elements are unstable and occur in extremely low concentrations in nature.
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. They react violently with water, forming hydroxides and releasing hydrogen gas and heat.
Caesium and francium are the most reactive and lithium is the least. These oxides somewhat resemble calcium, magnesium and aluminium oxides, sometimes called common earths.