Take a look at the photo below. Every of those colored balls is one electron. In one atom, the electron spin roughly the center, additionally called the nucleus. The electrons prefer to it is in in separate shells/orbitals. Shell number one have the right to only organize 2 electrons, shell two can hold 8, and also for the first eighteen elements shell three can hold a best of eight electrons. Together you learn about elements with much more than eighteen electron you will discover that shell three can hold an ext than eight. As soon as one covering is full, the following electron the is included has to relocate to the next shell.So... Because that the element of SODIUM, you currently know the the atomic number tells you the variety of electrons. That method there room 11 electron in a salt atom. Looking at the picture, you deserve to see there are two electrons in shell one, eight in covering two, and only one in shell three.


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► more about the background and areas to find sodium.► Next facet of the routine table.
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Sodium ChlorideThis is sodium chloride, likewise known as table salt. Most people scientist know that the formula because that salt is NaCl. One sodium (Na) atom provides it"s electron to one chlorine (Cl) atom. Chlorine then has actually the eight electron in its outer shell to do it "happy". Salt is "happy" due to the fact that it has actually now given up its one extra electron.
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Sodium OxideSo currently you have Na2O. When sodium (Na) atoms bond through one oxygen (O) atom, there need to be 2 sodium atoms, each v an extra electron. Each of these sodium atoms provides oxygen one electron, enabling oxygen to have actually a complete shell through eight electrons. See how the electrons are shared?
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