The First 20 Elements- Fully Explained

First Twenty Elements 1. Hydrogen-Hydrogen (H) is a neutral, odourless, non-metallic, tasteless, highly flammable diatomic gas. nuclear build 1 and commode tally 1 . notice by Henry Cavendish in 1766. 2. Helium-Helium (He) is a pale, odourless, tasteless, non-toxic, futile monatomic chemical element that heads the noble gas folding in the periodic table. nuclear topic 2 and aggregated reckon 4. ascertained by Pierre Janssen and Norman Lockyer in 1868. 3. Lithium-Lithium (Li) is a silvery white, soft metal, very unstable chemically, forms Li O and LiCl readily. In room temperatures, it is the least dense metal. Atomic egress 3 and hoi polloi number 7. notice by Johan exalted Arfwedson in 1817. 4. Beryllium-Beryllium (Be) is a grey metal, much harder than lithium, sanely reactive chemically, forms BeO and BeCl. Atomic number 4 and crapper number 9. Discovered by Louis-Nicolas Vauquelin in 1798 5. Boron-Boron (B) is a yellow or dark -brown non-metal, very hard element, not very reactive, still forms B O and BCl. Atomic number 5 and mass number Discovered by Jöns Jakob Berzelius in 1824. 6. Carbon-Carbon (C) is a dreary non-metal, brittle, non-reactive at room temperature. Forms CO and CCl. Atomic number 6 and mass number 12.

Carbon was discovered in prehistory and was known in the forms of soot and charcoal to the soonest humane civilizations but Vandermonde then showed that this substance was carbon 7. Nitrogen-Nitrogen (N) is a colourless gas, not very reactive, will form N O and NH Atomic number 7 and mass number 14. Discovered Daniel Rutherford in 1772. 8. Oxygen- Oxygen (O) is a color! less gas, moderately reactive,will touch on with most elements, forms carbon dioxide and MgO. Atomic number 8 and mass number 16. Discovered by Carl Wilhelm Scheele. 9.Fluorine- Fluorine (Fl) is a green-yellow gas, highly reactive, irritating to smell, forms NaF and MgF. Atomic number 9 and mass number 19. Discovered by Henri Moissan...If you want to get a coarse essay, order it on our website: BestEssayCheap.com

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