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 colourless, odourless, tasteless, non-toxic, indolent monatomic chemical element that heads the noble gas congregation in the periodic table.
Atomic topic 2 and aggregated number 4.
Discovered by Pierre Janssen and Norman Lockyer in 1868.
3. Lithium-Lithium (Li) is a silvery white, soft metal, very reactive chemically, forms Li O and LiCl readily. In room temperatures, it is the least dense metal.
Atomic number 3 and hoi polloi number 7.
Discovered by Johan August 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 mass number 9.
Discovered by Louis-Nicolas Vauquelin in 1798
5. Boron-Boron (B) is a yellow or 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 black 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 human 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 colorless gas, moderately reactive,will connect 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, extremely 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 extensive essay, order it on our website: Ordercustompaper.com
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