Take a look in ~ the snapshot below. Every of those fancy balls is an electron. In one atom, the electrons spin approximately the center, also called the nucleus. The electrons like to it is in in separate shells/orbitals. Covering number one can only organize 2 electrons, shell two have the right to hold 8, and for the an initial eighteen facets shell three have the right to hold a preferably of eight electrons. As you learn about elements with much more than eighteen electrons you will discover that covering three deserve to hold more than eight. As soon as one covering is full, the following electron that is added has to relocate to the following shell.So... Because that the aspect of OXYGEN, you currently know the the atomic number tells you the number of electrons. That method there room 8 electrons in one oxygen atom. Looking at the picture, you can see there are two electrons in shell one and also six in shell two.

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► more about the history and areas to find oxygen.► Next facet of the routine table.
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WaterThis is a water molecule. Also though friend find complicated names on various other molecules, everyone calls H2O "water". Water is comprised of two hydrogen (H) atoms and also one oxygen (O) atom. The formula because that water is H2O. The hydrogen atoms have filled orbitals v two electrons and the oxygen atom is filled with eight electrons.

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Lithium OxideTwo lithium (Li) atoms have the right to bond with one oxygen (O) atom, making the formula Li2O. Oxygen likes to have actually two added electrons to make it happy. Each lithium atom offers one. You deserve to see that the Oxygen atom has eight electron (6 that its own, and also one from each lithium), and the two lithium atoms have actually two electron each.
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Hydrogen PeroxideTwo hydrogen (H) atoms can additionally bond with two oxygen (O) atoms, making the formula H2O2. That"s just one much more oxygen than water, but it is a completely different compound. You have the right to see that each of the Oxygen atoms has actually eight electrons, and the two Hydrogens have actually two electrons each. See how the electrons room shared?
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