Take a look at the snapshot below. Each of those colored balls is an electron. In one atom, the electrons spin approximately the center, also called the nucleus. The electrons prefer to it is in in separate shells/orbitals. Shell number one deserve to only organize 2 electrons, covering two can hold 8, and also for the first eighteen elements shell three have the right to hold a maximum of eight electrons. Together you learn about elements with an ext than eighteen electrons you will discover that covering three can hold more than eight. As soon as one shell is full, the following electron that is included has to move to the following shell.So... Because that the facet of FLUORINE, you already know the the atomic number speak you the number of electrons. That means there room 9 electron in a fluorine atom. Looking in ~ the picture, you have the right to see there room two electrons in shell one and seven in covering two.

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► an ext about the history and areas to discover fluorine.► Next element of the periodic table.
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Lithium FluorideOne lithium (Li) atom can integrate with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it"s own. Lithium provides up its one electron to do both atoms happy. So the fluorine atom has actually eight electrons, and a filled external shell.
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Beryllium FluorideTwo fluorine (F) atom can likewise bond v one beryllium (Be) atom, make the formula BeF2. Beryllium gives up one of it"s electron to every of the fluorine atoms. The an outcome give each of the fluorines eight electrons, making their shells full.

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Aluminum TrifluorideFluorine (F) can additionally bond v aluminum (Al). Aluminum has actually three extra electrons and will easily let the fluorine atoms use them. Because aluminum has three, that method three fluorines deserve to bond. The make the formula AlF3, additionally known as aluminum trifluoride. Every of the fluorine atoms gets an electron to to fill their shell, and the aluminum loser three, offering it a filled shell too (remember, aluminum has three extra electrons). The surname trifluoride way three fluorine atoms are involved.
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