How Many Chemical Elements are There?
Chemical element is a general term for a group of atoms with the same number of nuclear charges (the number of protons in the nucleus). From a philosophical point of view, the element is the result of a qualitative change in the number of electrons of the atom. [1]
- [huà xué yuán sù]
- First <8> element
- 1.
- Since then, British physicists
Historical development of chemical elements
| Time | Element name | discoverer |
| Ancient | carbon | \ |
| Ancient | sulfur | \ |
| Ancient | iron | \ |
| Ancient | copper | \ |
| Ancient | Zinc | \ |
| Ancient | silver | \ |
| Ancient |
| \ |
| Ancient | antimony | \ |
| Ancient | gold | \ |
| Ancient | HG | \ |
| Ancient |
| \ |
| 1250 | arsenic | (Germany) Magnus (1193-1280) |
| 1669 | phosphorus | (Germany) Portland |
| 1735 | cobalt |
|
| 1735 | platinum | (West) DA de Ulloa (1716-1795) |
| 1751 | nickel | (Sweden) AF Cronsted (1722-1765) |
| 1753 | bismuth | (English) CJ Geoffory |
| 1766 |
| (English) H. Cavendish (1731-1810) |
| 1772 | nitrogen |
|
| 1774 | oxygen | (British) Priestley (1733-1804) |
| 1774 | chlorine | (Sweden) CW Scheele (1742-1780) |
| 1774 | manganese | (Sweden) JG Gahn (1745-1818) |
| 1778 | molybdenum | (Sweden) Elm (PJ Hjelm, 1746-1813) |
| 1782 | tellurium | (Austrian) Müller (FJ Müller, 1740-1825) |
| 1783 | Tungsten | (West) brothers de El Huyar |
| 1789 | beryllium | (French) LN Vauquelin |
| 1789 | zirconium | (German) MH Klaproth (1743-1817) |
| 1789 | uranium |
|
| 1791 | titanium |
|
| 1794 | yttrium | (Fin) Gadolin (J. Gadolin, 1760-1852) |
| 1798 | chromium | (French) Walkerland (LN Vauquelin, 1763-1829) |
| 1801 | niobium | (British) Hatchet (C. Hatchett, 1765? -1847) |
| 1802 | Tantalum | (Sweden) AG Ekeberg (1767-1813) |
| 1803 | rhodium | (British) Wollaston (WH Wollaston, 1766-1828) |
| 1803 | palladium | (UK) WH Wollaston |
| 1803 | cerium | (German) MH Klaproth, etc. |
| 1804 | iridium | (English) S. Tennant |
| 1804 | osmium | (British) S. Tennant (1761-1815) |
| 1807 | boron |
|
| 1807 | sodium |
|
| 1807 | Potassium | (English) H. Davy |
| 1808 | magnesium | (English) H. Davy |
| 1808 | calcium | (English) H. Davy and others |
| 1808 |
| (English) H. Davy |
| 1808 | barium | (English) H. Davy |
| 1811 | iodine | (France) Kutwa (JB Courtois, 1777-1838) |
| 1817 | lithium |
|
| 1817 | cadmium | (Germany) F. Stromeyer (1776-1835) |
| 1818 | selenium | (Sweden) JJ Berzelius (1779-1848) |
| 1823 | silicon | (Sweden) JJ Berzelius |
| 1824 | bromine | (French) Bala (AJ Balard, 1802-1876) |
| 1827 | aluminum | (Dan) HC Oersted (1777-1851) |
| 1828 | thorium | (Sweden) JJ Berzelius |
| 1830 | vanadium | (Sweden) NG Sefstrom (1787-1845) |
| 1839 | lanthanum | (Sweden) CG Mosander (1797-1858) |
| 1843 | terbium | (Sweden) CG Mosander |
| 1843 | erbium | (Sweden) CG Mosander |
| 1844 | ruthenium |
|
| 1860 | cesium | (German) Bunsen (RW Bunsen, 1811-1899), etc. |
| 1861 | rubidium | (German) Bunsen (RW Bunsen), etc. |
| 1861 | thallium | W. Crookes (1832-1919) |
| 1863 | indium | (Germany) Reich (F. Reich, 1799-1882), etc. |
| 1875 | gallium | (French) L. de Boisbaudran (1838-1912) |
| 1878 | ytterbium | (Switzerland) JCG Marignac |
| 1879 | scandium | (Sweden) Nelson (LF Nilson, 1840-1899) |
| 1879 | samarium | (French) L. de Boisbaudran |
| 1879 | holmium | (Sweden) PT Cleve (1840-1905) |
| 1879 |
| (Sweden) PT Cleve (1840-1905) |
| 1880 | gadolinium |
|
| 1885 | praseodymium |
|
| 1885 | neodymium |
|
| 1886 | fluorine | (French) H. Moissan (1852-1907) * |
| 1886 | germanium | (German) CA Winkler (1838-1904) |
| 1886 | dysprosium | (French) L. de Boisbaudran |
| 1894 | Argon | (English) Rayleigh (RJS Rayleigh, 1842-1919), etc. * |
| 1895 | Helium` |
|
| 1898 | ` | (French) Marie Curie (1867-1934) (born in Poland), etc. * |
| 1898 | radium |
|
| 1898 | neon |
|
| 1898 | ` | (English) W. Ramsay, etc. |
| 1898 | xenon | (English) W. Ramsay, etc. |
| 1899 | Actinium | (France) De Beerner (AL Debierne, 1874-1949) |
| 1900 | radon | (German) Dorn |
| 1901 | europium | (France) Demaroay (EA Demaroay, 1852-1904) |
| 1905 | Lutetium | (French) Urban (G. Urbain, 1872-?) |
| 1913 | protactinium | (Poland) K. Fajans (1887-?) |
| 1923 | hafnium | (Hungary) G. von Hevesey, etc. |
| 1925 | rhenium | (German) W. Noddack, etc. |
| 1937 | Technetium | (Italy) B. Segré and others |
| 1939 | francium | (French) MM Perey |
| 1939 | Neptunium | (US) EM McMillan, 1907-1991, etc. * |
| 1940 | Astatine | (US) DR Corson, etc. |
| 1940 | Plutonium | (U.S.) Seaberg (GT Seaborg, 1912-1999), etc. * |
| 1947 | Promethium |
|
Modern Development of Chemical Elements
- Of course, so far people's understanding of chemical elements has not ended. The current research on molecular structure in chemistry and the research on nuclear particles in physics are being carried out in depth, and it is expected that it will bring new understanding of chemical elements. As of 2007, a total of 118 elements have been found, of which 94 are present on Earth.
- Xinhua News Agency, Geneva, June 8th. The International Union of Pure and Applied Chemistry, headquartered in Zurich, Switzerland, announced on the 8th that it will synthesize chemical elements No. 113 (abbreviated as Nh), 115 (Mc), 117 (Ts) and 118. Og was nominated as a new chemical element. [6]