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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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7 8 9 10 11 12 13 14 15 16 17 18 1 2 3 4 5 6 7 lanthanide actinide copyright 1998 2023 by eni generalic h 1 1 008 he 2 4 0026 li 3 6 94 be 4 9 0122 b 5 10 81 c 6 12 011 n 7 14 007 o 8 15 999 f 9 18 998 ne 10 20 180 na 11 22 990 mg 12 24 305 al 13 26 982 si 14 28 085 p 15 30 974 s 16 32 06 cl 17 35 45 ar 18 39 948 k 19 39 098 ca 20 40 078 sc 21 44 956 ti 22 47 867 v 23 50 942 cr 24 51 996 mn 25 54 938 fe 26 55 845 co 27 58 933 ni 28 58 693 cu 29 63 546 zn 30 65 38 ga 31 69 723 ge 32 72 630 as 33 74 922 se 34 78 971 br 35 79 904 kr 36 83 798 rb 37 85 468 sr 38 87 62 y 39 88 906 zr 40 91 224 nb 41 92 906 mo 42 95 95 tc tc 43 98 ru 44 101 07 rh 45 102 91 pd 46 106 42 ag 47 107 87 cd 48 112 41 in 49 114 82 sn 50 118 71 sb 51 121 76 te 52 127 60 i 53 126 90 xe 54 131 29 cs 55 132 91 ba 56 137 33 la 57 138 91 ce 58 140 12 pr 59 140 91 nd 60 144 24 pm pm 61 145 sm 62 150 36 eu 63 151 96 gd 64 157 25 tb 65 158 93 dy 66 162 50 ho 67 164 93 er 68 167 26 tm 69 168 93 yb 70 173 05 lu 71 174 97 hf 72 178 49 ta 73 180 95 w 74 183 84 re 75 186 21 os 76 190 23 ir 77 192 22 pt 78 195 08 au 79 196 97 hg 80 200 59 tl 81 204 38 pb 82 207 2 bi 83 208 98 po 84 209 at 85 210 rn 86 222 fr 87 223 ra 88 226 ac 89 227 th 90 232 04 pa 91 231 04 u 92 238 03 np np 93 237 pu pu 94 244 am am 95 243 cm cm 96 247 bk bk 97 247 cf cf 98 251 es es 99 252 fm fm 100 257 md md 101 258 no no 102 259 lr lr 103 262 rf rf 104 267 db db 105 270 sg sg 106 271 bh bh 107 270 hs hs 108 277 mt mt 109 276 ds ds 110 281 rg rg 111 282 cn cn 112 285 nh nh 113 285 fl fl 114 289 mc mc 115 289 lv lv 116 293 ts ts 117 294 og og 118 294 la lu 57 71 ac lr 89 103 solid liquid gas absolute zero 0 k 273 15 c triple point of oxygen 54 3584 k 218 7916 c triple point of argon 83 8058 k 189 3442 c triple point of mercury 234 3156 k 38 8344 c triple point of water 273 16 k 0 01 c melting point of gallium 302 9146 k 29 7646 c freezing point of indium 429 7485 k 156 5985 c freezing point of tin 505 0785 k 231 928 c freezing point of zinc 692 6775 k 419 527 c freezing point of aluminum 933 473 k 660 323 c freezing point of silver 1234 93 k 961 78 c 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 direct...
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