Take a look at the picture below. Every of those colored balls is one electron. In an atom, the electrons spin about the center, also called the nucleus. The electrons like to be in separate shells/orbitals. Covering number one have the right to only hold 2 electrons, covering two can hold 8, and also for the very first eighteen elements shell three deserve to hold a maximum of eight electrons. Together you learn about elements with more than eighteen electrons you will uncover that covering three have the right to hold more than eight. As soon as one covering is full, the next electron the is added has to move to the next shell.So... For the facet of LITHIUM, you currently know that the atomic number speak you the variety of electrons. That means there room 3 electrons in a lithium atom. Looking at the picture, you deserve to see there space two electrons in covering one and only one in covering two.

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► an ext about the background and locations to find lithium.► Next aspect of the periodic table.
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Lithium OxideTwo lithium (Li) atoms have the right to bond v one oxygen (O) atom, make the formula Li2O. Oxygen likes to have actually two additional electrons to do it happy. Every lithium atom gives one. You can see the the oxygen atom has eight electron (6 of its own, and also one from each lithium), and also the two lithium atoms have actually two electron each.

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Lithium FluorideOne lithium atom can incorporate with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has actually seven electrons of it"s own. Lithium gives up the one electron to do both atoms happy. For this reason the fluorine atom has eight electrons, and a filled external shell.
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