Take a look at the picture below. Each of those colored balls is an electron. In an atom, the electrons spin about the center, likewise called the nucleus. The electrons favor to it is in in different shells/orbitals. Covering number one deserve to only hold 2 electrons, covering two have the right to hold 8, and for the an initial eighteen elements shell three deserve to hold a preferably of eight electrons. Together you learn around elements with more than eighteen electron you will discover that shell three have the right to hold an ext than eight. As soon as one covering is full, the following electron the is included has to move to the following shell.So... Because that the facet of CHLORINE, you already know the the atomic number tells you the number of electrons. That means there room 17 electron in a chlorine atom. Looking at the picture, you have the right to see there space two electrons in shell one, eight in covering two, and seven in shell three.

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► an ext about the history and locations to find chlorine.► Next facet of the regular table.
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Sodium ChlorideThis is sodium chloride, also known as table salt. Most world scientist understand that the formula for salt is NaCl. One sodium (Na) atom offers it\"s electron to one chlorine (Cl) atom. Chlorine then has actually the eight electrons in its external shell to make it \"happy\". Salt is \"happy\" since it has actually now offered up that one extra electron.

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Aluminum TrichlorideChlorine (Cl) can also bond through aluminum (Al). Aluminum has three extra electrons and will easily let the chlorine atoms use them. Since aluminum has three, that way three chlorine atoms can bond. They make the formula AlCl3, additionally known as aluminum trichloride. Each of the chlorine atoms gets an electron to fill its shell, and also the aluminum loses three, offering it a filled covering too (remember, Aluminum has three extra electrons). The surname trichloride method three chlorine atoms room involved.
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Nitrogen TrichlorideNitrogen can integrate with three chlorine atoms, forming Nitrogen trichloride, or NCl3. Nitrogen shares its electrons v the chlorine atoms, so every one of the atoms have actually their shells filled.Take a look in ~ the dots approximately the atoms. All of them now have eight electrons, and also a filled external shell!
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