Take a look at the snapshot below. Each of those colored balls is an electron. In an atom, the electrons spin roughly the center, also called the nucleus. The electrons choose to be in separate shells/orbitals. Covering number one have the right to only hold 2 electrons, shell two can hold 8, and for the first eighteen aspects shell three have the right to hold a preferably of eight electrons. Together you learn around elements with more than eighteen electrons you will find that covering three have the right to hold more than eight. As soon as one shell is full, the following electron the is included has to relocate to the following shell.So... Because that the facet of SODIUM, you already know that the atomic number tells you the variety of electrons. That means there room 11 electron in a salt atom. Looking in ~ the picture, you can see there are two electron in shell one, eight in covering two, and also only one in shell three.


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► much more about the background and places to discover sodium.► Next element of the regular table.
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Sodium ChlorideThis is sodium chloride, also known as table salt. Most world scientist know that the formula because that salt is NaCl. One salt (Na) atom offers it"s electron come one chlorine (Cl) atom. Chlorine then has actually the eight electrons in its external shell to make it "happy". Salt is "happy" due to the fact that it has actually now given up that one extra electron.
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Sodium OxideSo now you have actually Na2O. Once sodium (Na) atoms bond v one oxygen (O) atom, there have to be 2 sodium atoms, each with an extra electron. Each of these salt atoms offers oxygen one electron, permitting oxygen to have a complete shell with eight electrons. See exactly how the electrons space shared?
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