Take a look in ~ the photo below. Every of those fancy balls is one electron. In an atom, the electron spin about the center, also called the nucleus. The electrons like to it is in in separate shells/orbitals. Covering number one have the right to only host 2 electrons, shell two have the right to hold 8, and for the an initial eighteen aspects shell three have the right to hold a maximum of eight electrons. Together you learn around elements with an ext than eighteen electron you will find that covering three have the right to hold an ext than eight. Once one shell is full, the following electron that is included has to relocate to the next shell.So... For the facet of SODIUM, you already know that the atomic number speak you the variety of electrons. That means there are 11 electron in a salt atom. Looking at the picture, you have the right to see there are two electron in covering one, eight in covering two, and also only one in covering three.


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► an ext about the history and areas to find sodium.► Next aspect of the periodic table.
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Sodium ChlorideThis is sodium chloride, also known together table salt. Most human being scientist know that the formula because that salt is NaCl. One sodium (Na) atom gives it"s electron come one chlorine (Cl) atom. Chlorine then has the eight electrons in its external shell to make it "happy". Salt is "happy" since it has actually now provided up its one extra electron.
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Sodium OxideSo now you have Na2O. When sodium (Na) atoms bond v one oxygen (O) atom, there need to be 2 sodium atoms, each with an extra electron. Every of these sodium atoms offers oxygen one electron, allowing oxygen to have a full shell v eight electrons. See just how the electrons room shared?
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