Take a look at the picture below. Each of those colored balls is one electron. In an atom, the electrons spin about the center, additionally called the nucleus. The electrons prefer to it is in in separate shells/orbitals. Shell number one deserve to only host 2 electrons, covering two deserve to hold 8, and also for the first eighteen aspects shell three can hold a maximum of eight electrons. Together you learn around elements with an ext than eighteen electrons you will find that shell three deserve to 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 facet of CHLORINE, you already know that the atomic number tells you the variety of electrons. That method there room 17 electron in a chlorine atom. Looking in ~ the picture, you have the right to see there are two electron in covering one, eight in covering two, and also seven in covering three.

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► an ext about the history and places to find chlorine.► Next element of the periodic table.
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Sodium ChlorideThis is sodium chloride, also known together table salt. Most civilization 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 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 the one extra electron.

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Aluminum TrichlorideChlorine (Cl) can additionally bond through aluminum (Al). Aluminum has three extra electrons and also will easily let the chlorine atoms usage them. Since aluminum has actually three, that way three chlorine atoms have the right to bond. They do the formula AlCl3, additionally known together aluminum trichloride. Every of the chlorine atoms it s okay an electron to to fill its shell, and also the aluminum loser three, providing 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 combine with 3 chlorine atoms, developing Nitrogen trichloride, or NCl3. Nitrogen share its electrons with the chlorine atoms, so every one of the atoms have actually their shells filled.Take a look at the dots around the atoms. Every one of them now have eight electrons, and a filled outer shell!
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