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2. List of chemical elements - Wikipedia

   en.wikipedia.org/wiki/List_of_chemical_elements

   A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...

3. Periodic table - Wikipedia

   en.wikipedia.org/wiki/Periodic_table

   The chemical elements are what the periodic table classifies and organizes. Hydrogen is the element with atomic number 1; helium, atomic number 2; lithium, atomic number 3; and so on. Each of these names can be further abbreviated by a one- or two-letter chemical symbol; those for hydrogen, helium, and lithium are respectively H, He, and Li. [6]

4. List of chemical element name etymologies - Wikipedia

   en.wikipedia.org/wiki/List_of_chemical_element...

   unununium (Uuu, '111'): temporary systematic name and symbol. [61] Copernicium (Cn) 112 Copernicus, Nicolaus Polish via Latin Polish surname, literally: "copper nickel" eponym Named in honour of Nicolaus Copernicus. · Former names: eka-mercury, [21] and temporarily systematic name and symbol ununbium (Uub, '112'): temporary systematic name and ...

5. Names for sets of chemical elements - Wikipedia

   en.wikipedia.org/wiki/Names_for_sets_of_chemical...

   Another common classification is by degree of metallic or nonmetallic behaviour and characteristics. Elements in the vicinity of where the metals and nonmetals meet are sometime classified as metalloids or an equivalent term. These two to three classes are commonly marked by differing background colors in the periodic table.

6. Chemical symbol - Wikipedia

   en.wikipedia.org/wiki/Chemical_symbol

   Proposed name for berkelium. The symbol and name were later used for element 101. [nb 1] [nb 3] Ml: Moldavium: 87: Discredited claim to discovery of francium made by Horia Hulubei and Yvette Cauchois. [nb 2] [7] Ms: Magnesium: 12: Current symbol is Mg. [nb 1] Ms: Masrium: 88: Discredited claim to discovery of radium. [nb 2] Ms: Masurium: 43 ...

7. List of elements by atomic properties - Wikipedia

   en.wikipedia.org/wiki/List_of_elements_by_atomic...

   This is a list of chemical elements and their atomic properties, ordered by atomic number (Z).. Since valence electrons are not clearly defined for the d-block and f-block elements, there not being a clear point at which further ionisation becomes unprofitable, a purely formal definition as number of electrons in the outermost shell has been used.

8. Naming of chemical elements - Wikipedia

   en.wikipedia.org/wiki/Naming_of_chemical_elements

   All 118 discovered elements are confirmed and have a formal name and symbol, as decided by IUPAC. The last four names and symbols were added on November 28, 2016. [1] [2] Currently there are no unconfirmed discoveries and all seven periods (rows) of the periodic table are completed.

9. Germanium - Wikipedia

   en.wikipedia.org/wiki/Germanium

   In his report on The Periodic Law of the Chemical Elements in 1869, the Russian chemist Dmitri Mendeleev predicted the existence of several unknown chemical elements, including one that would fill a gap in the carbon family, located between silicon and tin. [12] Because of its position in his periodic table, Mendeleev called it ekasilicon (Es ...