Oxygen with the symbol O has the atomic number 8 which means it is the 8th element in the table. Question Date: 2005-10-08: Answer 1: The Periodic Table of elements can tell you a lot about the elements. Oxygen has atomic number 8 meaning a single oxygen atom has 8 protons and 8 electrons BUT the question is about O2. A neutral oxygen atom will also have eight electrons. An oxide ion has 8 protons and 10 electrons. The ion has the same number of protons because you never loose a proton to make an ion. Therefore O2- will have 8 protons but 10 electrons instead of 8. This means that the nuclei of all oxygen atoms have eight protons. The thing that separates one element from the other is how many protons the nucleus has. Photo: Benjah-bmm27 via Wikimedia Commons, Public Domain. Free radicals are, by definition, neutral, i.e. Oxygen has atomic number eight. In an oxygen ion with a 2^- charge, the number of protons is still 8, but the number of electrons is 10. Oxygen molecules are themselves stable diradicals in which the two unpaired electrons are in parallel spin states. Oxygen has 6 valence electrons. It doesn't matter what the superscript is. The correct option is C. Related. They want 8 electrons so they need to steal two or share two. How many unpaired electrons are present in N 2 + : View solution The number of antibonding electron paris in O 2 2 − molecular ion on the basis of molecular orbital theory are (At. Although the chemical formula for this allotrope is O2, it is frequently just referred to as oxygen.O2 or dioxygen’s particular formulation is one of the most common elemental compounds on the planet, constituting around 20.8% of the Earth’s atmosphere. Refer to the explanation. O 2-has 2 more electrons. A way to remember this is to note that it is in column 16 of the periodic table. The O2 molecule of 2 oxygen atoms will have 16 protons and 16 electrons. Oxygen (atomic number 16) has 6 electrons in outermost shell. no O = 8 ) Oxygen atoms only have 6 valence electrons (electrons in the outer shell). This means that it has gained two electrons from another element, such as sodium or magnesium. This is called a triplet state. Dioxygen is unusually (for a radical) stable. O2 is an allotrope of oxygen and is made out of two oxygen atoms bound together. Oxygen has the atomic number 8, which means the nuclei of its atoms have 8 protons. they must have as many electrons as protons. Oxygen has three stable isotopes, 99.76%""^16"O", 0.04%""^17"O", and 0.20%""^18"O". Two oxygen atoms in a oxygen molecule share two electrons. A neutral oxygen atom as also has 8 electrons. Note: most of the time in practice you won't get O--. If your ion is 2- then you need 2 additional electrons so you would have 10 electrons. O2 is diatomic oxygen, or, two oxygen atoms that are bound to each other. The oxide anion has a charge of 2-. 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