Discoverers of Elements of Periodic Table
Discoverers of Elements of Periodic Table| Element | Discovered By |
|---|---|
| ഓക്സിജൻ | ജോസഫ് പ്രീസ്റ്റ്ലി |
| ഹൈഡ്രജൻ | ഹെൻട്രി കാവൻഡിഷ് |
| നൈട്രജൻ | ഡാനിയൽ റൂഥർഫോർഡ് |
| സിലിക്കൺ | ബേർസേലിയസ് |
| തോറിയം | ബെർസേലിയസ് |
| മെഗ്നീഷ്യം | ജോസഫ് ബ്ലാക്ക് |
| കാൽസ്യം | ഹംഫ്രി ഡേവി |
| പൊട്ടാസിയം | ഹംഫ്രി ഡേവി |
| സോഡിയം | ഹംഫ്രി ഡേവി |
| യുറേനിയം | മാർട്ടിൻ ക്ലാപ്രോത്ത് |
| റേഡിയം | മേരി ക്യൂറി |
| പൊളോണിയം | മേരിക്യൂറി, പിയറി ക്യൂറി |
| ക്ലോറിൻ | കാൾ ഷിലെ |
| അയഡിൻ | ബെർണാഡ് കൊർട്ടേയ്സ് |
| ഫോസ്ഫറസ് | ഹെന്നി ങ് ബ്രാൻഡ് |
| സെലിനിയം | ബെർസേലിയസ് |
| Element | Discovered By |
|---|---|
| Aluminum | Hans Christian Oersted |
| Americium | Glenn T. Seaborg Ralph A. James Leon O. Morgan Albert Ghiorso |
| Antimony | Known since ancient times |
| Argon | Sir William Ramsay Lord Rayleigh |
| Arsenic | Known since ancient times |
| Barium | Sir Humphry Davy |
| Berkelium | Stanley G. Thompson Glenn T. Seaborg Kenneth Street, Jr. Albert Ghiorso |
| Bismuth | Claude Geoffroy the Younger |
| Bohrium | Scientists at Dubna, Russia |
| Boron | Joseph-Louis Gay-Lussac Louis-Jaques Thénard Sir Humphry Davy |
| Bromine | Antoine-Jérôme Balard |
| Cadmium | Friedrich Strohmeyer |
| Calcium | Sir Humphry Davy |
| Californium | Stanley G. Thompson Glenn T. Seaborg Kenneth Street, Jr. Albert Ghiorso |
| Carbon | Known since ancient times |
| Cerium | Jöns Jacob Berzelius Wilhelm von Hisinger Martin Heinrich Klaproth |
| Cesium | Robert Wilhelm Bunsen Gustav Robert Kirchoff |
| Chlorine | Carl Wilhelm Scheele |
| Chromium | Louis-Nicholas Vauquelin |
| Cobalt | Georg Brandt |
| Copper | Known since ancient times |
| Dysprosium | Paul-Émile Lecoq de Boisbaudran |
| Einsteinium | Albert Ghiorso et. al. |
| Europium | Eugène-Antole Demarçay |
| Fluorine | Ferdinand Frederic Henri Moissan |
| Francium | Marguerite Catherine Perey |
| Gadolinium | Jean Charles Galissard de Marignac |
| Gallium | Paul-Émile Lecoq de Boisbaudran |
| Germanium | Clemens Winkler |
| Gold | Know to the Ancients |
| Helium | Pierre-Jules-César Janssen |
| Holmium | Per Theodor Cleve |
| Hydrogen | Henry Cavendish |
| Indium | Ferdinand Reich Hieronymus Theodor Richter |
| Iodine | Barnard Courtois |
| Iridium | Smithson Tennant |
| Iron | Known since ancient times |
| Krypton | Sir William Ramsay Morris M. Travers |
| Lanthanum | Carl Gustaf Mosander |
| Lead | Known since ancient times |
| Lithium | Johann August Arfvedson |
| Lutetium | Georges Urbain |
| Magnesium | Sir Humphry Davy |
| Manganese | Johan Gottlieb Gahn |
| Meitnerium | Peter Armbruster Gottfried Münzenber |
| Mercury | Known since ancient times |
| Molybdenum | Carl Welhelm Scheele |
| Neodymium | Carl F. Auer von Welsbach |
| Neon | Sir William Ramsay Morris M. Travers |
| Neptunium | Edwin M. McMillian Philip H. Abelson |
| Nickel | Axel Fredrik Cronstedt |
| Niobium | Charles Hatchett |
| Nitrogen | Daniel Rutherford |
| Osmium | Smithson Tennant |
| Oxygen | Joseph Priestley |
| Palladium | William Hyde Wollaston |
| Phosphorus | Hennig Brand |
| Platinum | Known to pre-Columbian Indians Antonio de Ulloa |
| Plutonium | Glenn T. Seaborg Joseph W. Kennedy Edward M. McMillan Arthur C. Wohl |
| Polonium | Marie Sklodowska Curie |
| Potassium | Sir Humphry Davy |
| Protactinium | Kasimir Fajans O.H. Göhring |
| Radium | Marie Sklodowska Curie Pierre Curie |
| Radon | Friedrich Ernst Dorn |
| Rhenium | Ida Tacke-Noddack Walter Noddack Otto Carl Berg |
| Rhodium | William Hyde Wollaston |
| Rubidium | Robert Bunsen Gustav Kirchhoff |
| Ruthenium | Karl Karlovich Klaus |
| Samarium | Jean Charles Galissard de Marignac |
| Scandium | Lars Fredrik Nilson |
| Seaborgium | Albert Ghiorso et. al. |
| Selenium | Jöns Jacob Berzelius |
| Silicon | Jöns Jacob Berzelius |
| Silver | Known since ancient times |
| Sodium | Sir Humphry Davy |
| Strontium | Adair Crawford |
| Sulfur | Known since ancient times |
| Tantalum | Anders Gustaf Ekenberg |
| Tellurium | Franz Joseph Müller von Reichenstein |
| Terbium | Carl Gustaf Mosander |
| Thallium | Sir William Crookes |
| Thorium | Jöns Jacob Berzelius |
| Thulium | Per Theodor Cleve |
| Tin | Known since ancient times |
| Titanium | The Reverend William Gregor |
| Tungsten | Juan José Fausto Elhuyar |
| Uranium | Martin Heinrich Klaproth |
| Vanadium | Andrés Manuel del Rio Nils Gabriel Sefstrôm |
| Xenon | Sir William Ramsay Morris M. Travers |
| Ytterbium | Jean Charles Galissard de Marignac |
| Yttrium | Johan Gadolin |
| Zinc | Known since ancient times |
Category of Indian Missiles .
Air-to-air missiles.
Anti-Tank Missiles.
Ballistic Missile Defence /Interceptor Missiles.
Cruise Missiles.
Submarine Launched Ballistic Missiles.
Surface-To-Air Missiles.
Surface-to-surface missiles.
Prithvi - ഭൂതല ഹ്രസ്വദൂര ബാലിസ്റ്റിക് മിസൈലുകളാണ് പൃഥ്വി. ഇന്റഗ്രേറ്റഡ് ഗൈഡഡ് മിസൈൽ ഡവലപ്മെന്റ് പ്രോഗ്രാമിന് കീഴിൽ (DRDO) വികസിപ്പിച്ചെടുത്തതാണിത്. ഇന്ത്യ തദ്ദേശീയമായി വികസിപ്പിച്ചെടുത്ത ആദ്യമിസൈലാണ് പൃഥ്വി. 150 കി.മീ മുതൽ 350 കി.മീ വരെ ദൂരപരിധിയുള്ള വ്യത്യസ്ത...
Active Market .
This is a term used by the stock exchange which specifies the particular stock or share which deals in frequent and regular transactions. It helps the buyers to obtain reasonably large amounts at any time.
Administered Price .
The administrative body e.g., the government a marketing board or a trading group determines this price. The competitive market force is not entitled to determine this price. The government fixes a price in accordance with a demand-supply portion in the market. .
Ad-valorem Tax .
Ad-valorem tax is a kind of indirect tax in which goods are taxed by their values. In the case of ad-volorem tax, the tax amount is calculated as the proportion of the price of the goods. Value-added Tax (VAT) is an ad-volorem Tax.
Advanced Countries .
Advanced countries ar...
Suppose there are n people in the party. The first person shakes hand with the other (n-1) guests. The second guest shakes hand with the other (n-2) guests. this will continue until the (n-1)-th guest shakes hand with the nth guest.
Total number of handshakes is (n-1) + (n-2).. + 3 + 2 + 1. .
= (n-1)(n)/2 .
For example, 6 people in a party shake hand with other guests. So how many handshakes will be there?.
=(6-1)(6)/2.
=15.
ഏതാനും പേര് തമ്മില് പരസ്പരം ഹസ്തദാനം നടത്തിയാല് ആകെഹസ്തദാനങ്ങളുടെ എണ്ണംകാണുവാനുള്ള സൂത്രവാക്യമാണ് (n-1)(n)/2 ഇവിടെ ' n ' എന്നത് ആളുകളുടെ എണ്ണമാണ്. ഉദാഹരണത്തിന് 6 പേര്...
















