Take a look in ~ the photo below. Every of those fancy balls is an electron. In an atom, the electron spin about the center, also called the nucleus. The electrons prefer to be in different shells/orbitals. Covering number one can only hold 2 electrons, covering two can hold 8, and also for the very first eighteen elements shell three deserve to hold a maximum of eight electrons. Together you learn around elements with more than eighteen electron you will uncover that shell three can hold much more than eight. When one covering is full, the following electron the is included has to move to the following shell.So... For the element of ALUMINUM, you already know the the atomic number speak you the number of electrons. That means there are 13 electron in a aluminum atom. Looking at the picture, you can see there room two electrons in shell one, eight in covering two, and also three in covering three.

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► an ext about the background and places to find aluminum.► Next facet of the regular table.