In Chapter 1, we described Dalton’s theory that each chemical compound has a particular combination of atoms and that the ratios of the numbers of atoms of the elements present are usually small whole numbers. In science, simplicity and beauty are often equated - and that makes hydrogen as beautiful as they come, a single proton and a lone electron making the most compact element in existence. (8 atoms)(15.9994 amu/atom) = 127.9952 amuįormula mass of Ca 3(PO 4) = 310.177 2amu Forget 10 Downing Street or 1600 Pennsylvania Avenue, the most prestigious address in the universe is number one in the periodic table, hydrogen. The atomic number of each element increases by one, reading from left to right. The value given 6.022 x 1023 is called Avagadros number for the scientist that found the number of atoms in 12 grams of carbon 12. When the chemical elements are thus arranged, there is a recurring pattern called the periodic law in their properties, in which elements in the same column (group. Platinum metal is silvery white and does not oxidise, properties that make it highly appealing for jewellery. periodic table, in chemistry, the organized array of all the chemical elements in order of increasing atomic number i.e., the total number of protons in the atomic nucleus. Platinum is a very different substance to a chemist. An album has gone platinum, platinum wedding anniversaries, and highly prized platinum jewellery such as rings and Rolex watches. Period A horizontal row in the periodic table. Platinum as a metal speaks of prestige, value and power. (2 atoms)(30.973761 amu/atom) = 6.0474 amu Members of a group typically have similar properties and electron configurations in their outer shell.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |