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.Number systems converter - easy to use tool which converts a decimal numbers to binary (octal, hexadecimal.Roman numerals converter - a small, easy to use tool which converts Roman Numerals to Arabic numbers and vice versa.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).Molar mass calculator - Enter a chemical formula to calculate its molar mass and press Enter.Gas laws calculator: general gas equation, Charles' law, Gay-Lussac's law, Boyle's law, and combined gas law.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.Calculator - the best online scientific calculator.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.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. On you can find two version 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.
Rows are arranged so that elements with similar properties fall into the same vertical columns ("groups"). 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). We can list elements in order of increasing atomic number but it wouldn't be a periodic table any more. 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. Why is the periodic table shaped like it is?
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