Take a look at the photo below. Each of those fancy balls is one electron. In one atom, the electron spin about the center, also called the nucleus. The electrons choose to it is in in separate shells/orbitals. Shell number one have the right to only organize 2 electrons, covering two can hold 8, and for the very first eighteen elements shell three have the right to hold a maximum of eight electrons. Together you learn about elements with much more than eighteen electron you will find that shell three can hold more than eight. Once one shell is full, the following electron the is included has to move to the next shell.So... For the facet of OXYGEN, you currently know the the atomic number tells you the number of electrons. That method there are 8 electrons in one oxygen atom. Looking in ~ the picture, you can see there space two electron in shell one and also six in covering two.

You are watching: How many electrons in an oxygen atom


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► more about the background and locations to discover oxygen.► Next facet of the routine table.
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WaterThis is a water molecule. Also though friend find complex names on other molecules, everyone calls H2O "water". Water is comprised of 2 hydrogen (H) atoms and also one oxygen (O) atom. The formula for water is H2O. The hydrogen atoms have filled orbitals with two electrons and also the oxygen atom is filled v eight electrons.

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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 added electrons to make it happy. Every lithium atom provides one. You have the right to see that the Oxygen atom has eight electrons (6 that its own, and one from each lithium), and also the 2 lithium atoms have actually two electrons each.
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Hydrogen PeroxideTwo hydrogen (H) atoms can also bond through two oxygen (O) atoms, making the formula H2O2. That"s simply one much more oxygen than water, but it is a totally different compound. You have the right to see the each the the Oxygen atoms has eight electrons, and also the two Hydrogens have two electron each. See just how the electrons room shared?
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