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.
|Published (Last):||23 January 2017|
|PDF File Size:||7.29 Mb|
|ePub File Size:||14.17 Mb|
|Price:||Free* [*Free Regsitration Required]|
Results 11—20 of for halogeni elementi.
These elements make up group 1 of the periodic table of elements. Halocarbon is a compound containing no elements other than carbon, one or more halogens, and sometimes hydrogen. Every known isotope of the actinide elements is radioactive.
Most are made artificially. 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 original form was proposed by Dmitri Mendeleev inusing relative atomic masses. These elements got their name from the fact that chemists first isolated them in their oxide forms. Traces of Pa, Np and Pu are consequently found, but only Th and U occur naturally to any useful extent.
Alkali metal is a term that refers to six elements: Do you want to know more? They react violently with water, forming hydroxides and releasing hydrogen gas and heat. The simplest are compounds such as tetrachloromethane CCl 4tetrabromomethane CBr 4etc.
The series includes the following elements: When polymerized, they yield plastics characterized by extreme chemical resistance, high electrical resistivity, and good heat resistance. Image Gallery Analytical chemistry Crystal systems Electrodes and cells Graphs and tables Hazard labels Laboratory apparatus Laboratory glassware Molecular geometry Structural formulas. Transuranium elements are unstable and occur in extremely low concentrations in nature.
They all form singly charged elmeenti ions, and are extremely reactive.
Chemistry Glossary: Search results for ‘halogeni elementi’ (Page 2)
Caesium and francium are the most reactive and lithium is the least. It is often expressed as a percentage. 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.
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 elementu in magnitude but opposite in sign.
Actinides actinons or actinoids are the fourteen elements from thorium to lawrencium inclusive, which follow actinium in the periodic table. These oxides somewhat resemble calcium, magnesium and aluminium oxides, sometimes called common earths.
The position of actinium is somewhat equivocal and, although not itself an elementu, it is often included with them for comparative purpose.