The periodic table is one of the essential components of our understanding of the universe and underlies all of chemistry.
The shape of the periodic table and the placement of an element in a particular group or period is derived from the electronic structure of the atoms of the element.
The emergence of the periodic table occurred concurrently with the development of the scientific understanding of the composition of matter.
Mendeleev's and Moseley's development of the periodic table was one of the greatest achievements in modern chemistry.
The periodic table of the chemical elements is a tabular display of the chemical elements.
Finally, in 1869, the German Julius Lothar Meyer and the Russian chemistry professor Dmitri Ivanovich Mendeleev almost simultaneously developed the first periodic table, arranging the elements by mass.
The periodic table is a useful tabular arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties, whose adopted structure shows periodic trends.
Before all the naturally-occurring elements were discovered, the periodic table was used to predict the chemical and physical properties of elements in the gaps on the table. ... The table is useful for modern students and scientists because it helps predict the types of chemical reactions that are likely for an element.
The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.Aug 28, 2017
The symbol Hg that mercury is known by comes from its Greek name, hydrargyrum, which means "liquid silver" — to reflect its shiny surface. The element is also known as quicksilver for its mobility.Dec 18, 2014
Chlorine is in group 17 of periodic table, also called the halogens, and is not found as the element in nature - only as a compound. The most common of these being salt, or sodium chloride, and the potassium compounds sylvite (or potassium chloride) and carnallite (potassium magnesium chloride hexahydrate).
Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point.
The elements of the periodic table sorted by symbolSymbolName chemical elementVVanadiumWTungstenXeXenonYYttrium114 more rows
The name is derived from the english word potash. The chemical symbol K comes from kalium, the Mediaeval Latin for potash, which may have derived from the arabic word qali, meaning alkali. Potassium is a soft, silvery-white metal, member of the alkali group of the periodic chart.
Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element.
The elements of the periodic table sorted by atomic numberAtomic numberName chemical elementSymbol1HydrogenH2HeliumHe3LithiumLi4BerylliumBe114 more rows