Be-9

Beryllium is the fourth atom in the Periodic Table of Elements making its atomic number 4. It is a solid at room temperature and has a grayish shade to it. Its atomic mass if 9 and its chemical symbol is Be. Beryllium has 4 protons in it, 4 electrons and 5 neutrons. Beryllium is an alkaline earth element. Alkaline earth elements are metallic elements in the second group of the periodic table. All alkaline earth elements are very reactive and have an oxidation number of +2. The oxidation number of an atom is how many electrons an atom is willing to give up in a regular state. Therefore, Beryllium will give out 2 electrons normally. Because Beryllium atoms are very reactive, alkaline metals are not found free in nature. The density of Beryllium is 1.8477 grams per cubic centimeter making it more dense than water. Beryllium is used in missiles, spacecrafts, and aircrafts. Beryllium was discovered in 1798 by Fredich Wohler.





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