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description= Everything for chemists: from the periodic system in online and PDF versions, to online calculators and free software for chemists. English-Croatian chemistry dictionary and glossary is always at hand.;
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author= Eni Generalic, Faculty of Chemistry and Technology, Split, Croatia;
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Text of the page (random words):
freezing point of gold 1337 33 k 1064 18 c freezing point of copper 1357 77 k 1084 62 c relative atomic masses are expressed with five significant figures for elements that have no stable nuclides the value enclosed in brackets indicates the mass number of the longest lived isotope of the element however four such elements bismuth thorium protactinium and uranium do have a characteristic terrestrial isotopic composition and for these an atomic weight is tabulated atomic weights of the elements 2013 pure appl chem vol 88 no 3 2016 265 291 online contents why is the periodic table shaped like it is organization of chemical elements in alphabetical order by their names or symbols doesn t tell us anything about their properties but it is useful when searching for an element we can list elements in order of increasing atomic number but it wouldn t be a periodic table any more the periodic table is a chart that organizes the elements by increasing atomic number and their chemical and physical properties see article history of the periodic table of elements rows are arranged so that elements with similar properties fall into the same vertical columns groups long form of the periodic table the lanthanides and actinides should actually be placed in the middle of the table as well after lanthanum and actinium but because of their similarity to each other they are removed from the middle to save space short form of the periodic table on periodni com you can find two version of the periodic table enig periodic table of the elements a very attractive periodic table available in six languages german english french croatian italian and spanish and twelve temperatures its 90 completely designed in css ascii periodic table of the elements a periodic table especially made for browsers with slow or expensive connections such as a mobile phone users or for purely text based browsers like lynx javascript programs calculator the best online scientific calculator scientific calculator for chemists can be used as a common scientific calculator sin cos log power root memory but also contains a molecular weight calculator and tables with various physical and chemical constants gas laws calculator general gas equation charles law gay lussac s law boyle s law and combined gas law molar mass calculator enter a chemical formula to calculate its molar mass and press enter angle converter is highly helpful if you have angles measured in degrees or grads or radians and you want them in radians or grads or decimal degrees roman numerals converter a small easy to use tool which converts roman numerals to arabic numbers and vice versa number systems converter easy to use tool which converts a decimal numbers to binary octal hexadecimal and vice versa php programs preparation of solutions a useful tool which allows you to calculate how many solid chemicals or stock solutions you will need to prepare the desired solution labeling of chemical containers after you prepare the solution we need label the container to clearly identify its contents this tool will prepare a label for a bottle with all the necessary information and hazard pictograms related pages list of chemical compounds abbreviations and acronyms of chemical compounds ghs hazard pictograms oxidation numbers calculator the sum of the oxidation numbers of all the atoms in a species must be equal to the net charge on the species writing chemical equations on the web this script produces code for writing chemical equations with double arrows and oxidation numbers which can be directly embedded into html websites forums or blogs do you have a redox equation you don t know how to balance besides simply balancing the equation in question these programs will also give you a detailed overview of the entire balancing process with your chosen method balancing redox reactions by ion electron method also called the half reaction method balancing redox reactions by oxidation number change method balancing redox reactions by aggregate redox species method or ars method new on periodni com related pages practice exercises divide the redox reaction into two half reactions new on periodni com balancing chemical equations using gauss elimination method every chemical equations must be balanced this calculator uses the gaussian elimination method to determine the stoichiometric coefficients of a chemical equation online games memory game a javascript version of the popular memory card game also known as concentration themes chemistry animals elements find the pairs match the words with the correct images or name and symbol of element english croatian chemistry dictionary and glossary the ilustrated chemical glossary contains basic information about basic terms in chemistry physical quantities measuring units classes of compounds and materials and important theories and laws a b c d e f g h i j k l m n o p q r s t u v w x y z articles and tables electronic configurations of the elements the electron configuration describes the distribution of electrons in the shell of an atom at various energy states this is described by the occupied sub shells the shell number is followed by the letter of the sub shell with the number of electrons in the shell indicated by a superscript number fundamental physical constants codata recommended values of the fundamental physical constants 2014 solubility product constants solubility product constant k sp or the solubility product is the product of the molar concentrations of the constituent ions each raised to the power of its stoichiometric coefficient in the equilibrium equation si international system of units the base quantities used in the international system of units are length mass time electric current thermodynamic temperature amount of substance and luminous intensity the corresponding base units of the si were chosen by the cgpm to be the metre the kilogram the second the ampere the kelvin the mole and the candela abbreviations and acronyms of chemical compounds standard abbreviations and acronyms of chemical compounds used by the journal of organic chemistry joc require no definition nfpa 704 hazard diamond nfpa 704 standard system for the identification of the hazards of materials for emergency response ghs hazard pictograms the diamond shaped pictograms indicate the nature of the hazards associated with the use of a hazardous substance or mixture do you know what these pictograms mean crystal systems and bravais lattices crystal system is a method of classifying crystalline substances on the basis of their unit cell there are seven unique crystal systems cubic hexagonal tetragonal trigonal orthorhombic monoclinic and triclinic stoichiometry stoichiometric calculations five steps to the solution stoichiometric calculations are based on the equalization between the ratio of the amount of substance we re interested in and the ratio of the corresponding absolute values of the stoichiometric numbers almost every single stoichiometric task can be solved in five easy steps and with only a basic knowledge of mathematics quantitative expression of composition of mixtures and solutions the quantitative composition of a solution can be expressed with concentration fraction ratio molar mass and volume and molality chemistry rare earth elements ree rare earth elements ree are a collection of seventeen chemical elements in the periodic table specifically the fifteen lanthanides plus scandium and yttrium history of the rare earth elements the close chemical similarity of the rare earth elements is displayed in their occurring together in nature and further by the fact that it took nearly 150 years to isolate and identify them naming of elements of atomic numbers greater than 100 in 1978 iupac commission on the nomenclature of inorganic chemistry decided that it is necessary to have a systematic naming for the elements with atomic number z 100 even for those which had not been discovered history of the periodic table of elements short history of how the periodic table of chemical elements was arranged from lavoisier s table of simple substances to seaborg actinide concept chlorinity and salinity of seawater the most characteristic feature of seawater is its salty taste each liter of the ocean contains approximately 34 g of dissolved salts ecology do follow us global warming cooling or pollution climate change some will lie for money privileges power while others will present data that support their truth the third are exclusive and believe only in their own truth the fourth are most likely right but they are lost in all this crowd which one of them is actually right only time will tell global warming and mankind greenhouse gasses are gasses that allow unhindered passage of short wave sunlight visible part of the spectrum and ultraviolet radiation and absorb long wave radiation infrared radiation story of ozone and ozone holes the effect of ozone depends on how far away we are from it it poisons us in the cities photochemical smog it heats us in the troposphere greenhouse gas and protects us in the stratosphere ozone layer world war 3 battle for earth i believe you all heard the old saying about how we did not inherit the earth from our parents but are instead borrowing it from our children if we want our children to be better follow us battle for earth the ozone layer is not a shield it is the remnant of uv radiation protection ozone does not have a shield that reflects ultraviolet radiation it sacrifices itself for our protection no matter how thick the ozone layer is it will simply disappear when illuminated the ozone layer represents a negative image in terms of uv radiation protection it is comprised of ozone molecules that uv photons did not hit and those that were not dissociated even though they were hit webmaster tools a small collection of tools which may help with designing and creating web pages hexadecimal color codes the table of color names and their corresponding rgb values colors sorted alphabetically and colors sorted by hex values writing mathematical and chemical equations on the web how to display fractions in web pages or write the double arrow in the equilibrium reaction character entity references in html character entity references for international characters symbols mathematical symbols and greek letters unicode utf 8 encoding the unicode standard assigns a code point a number to each character in every supported script deutsch english français hrvatski italiano español download pdf documents printable pdf documents below are several versions of the periodic table prepared for printing on a4 paper 297 210 mm printable periodic table black and white version printable periodic table colour version blank periodic table worksheets for student work is chemistry in your job description or a subject in school here you can find a bookmark sized periodic table with basic instructions on how to balance chemical reactions periodic table bookmark and rules and style conventions for writing si units and quantities shortened to a single page rules and style conventions for expressing values of quantities make 3d paper models of seven basic crystal systems a4 paper 297 210 mm 3d paper models of crystal systems or print a large educational poster for your laboratory wall a1 paper 841 594 mm qualitative inorganic analysis separation and identification of cations deutsch english français hrvatski italiano español download images bitmap images the chemistry images collection includes more than 300 images of laboratory glassware and apparatus structural formulas crystal systems graphs and more you can download and use any image from my site and use it in your own work either personal or commercial chemistry images gallery the periodic table is also available as a desktop background wallpaper choose a size according to the resolution of your monitor image dimensions hd 1920 1080 1674 1080 1280 826 1024 661 800 516 desktop wallpapers high resolution images image dimensions 3265 2160 the periodic table of the chemical elements deutsch english français hrvatski italiano español download software c programs the new chemistry assistant consists of several separate programs these programs are written in pure c without mfc for faster execution speed and smaller size and each program can be used separately as a portable application part i calculator for chemists is a small but powerful scientific expression calculator which supports many scientific functions sin cos log power root memory normal and inverse all of the calculations can be printed or saved and recalled again calculator for chemist online help part ii solution calculator is a useful tool which allows you to calculate how many solid chemicals or stock solutions you will need to prepare the desired solution the program provides lab ready directions on how to prepare the desired solution solution calculator online help part iii unit number converter is a program that will convert most popular units of length mass volume temperature pressure energy and many others it also includes the ability to create custom conversions for anything you want you can create your own custom units this simple tool allows you to convert the number from one numeral system into another for example from binary into decimal or roman numeral system unit number converter online help dictionaries and translators english croatian dictionary in the stardict format necessary for onyx boox my new e book reader is made through conversion of a two column dictionary file eh txt by dr goran igalya in to the stardict format english croatian dictionary the serbian croatian translator is a free visual basic program for all windows platforms that can translate texts subtitles for movies or whole web pages from serbian to croatian the most important thing in the program are the dictionary files which grow with each read translated book sr2hr dictionary contains over 90 000 words serbian croatian translator visual basic programs a small collection of my old but fully functional programs written in visual basic 6 0 enig periodic table of the elements contains the basic data about the element in 7 languages it shows visually the change of physical condition with the change of temperature enig chemistry assistant visualbasic scientific calculator for fast calculations of molecular weight quadratic equations quantity of chemicals for preparations of solutions and statistic analysis of experimental data enig change code page converts web pages between different standards eg from windows 1250 in to iso 8859 2 or utf 8 deutsch english français hrvatski italiano español eni generalic university of split faculty of chemistry and technology ruđera boškovića 35 split croatia hrvatska enig periodni com city of split world championship in picigin bibliography back to top citing this page generalic eni periodic table of the elements calculators and printable materials enig ...
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