2017年1月10日 · $\ce O$ is a free oxygen atom and $\ce{O2}$ is two oxygen atoms chemically bound to form an oxygen molecule. There is no common analogy for $\ce C$, but $\ce{N2}$ is called nitrogen, $\ce{H2}$ is hydrogen and $\ce{Cl2}$ is chlorine, each having the same name as that of their constituent elements.

2018年5月21日 · Because it isn't stable as a single atom It's true that Oxygen, can be termed as "O". But one oxygen atom cant exist on its own, because its unstable. Usually any atom needs 8 electrons in its outer orbit in order to stay stable. But, the Oxygen atom has 6 electrons in its outer orbit. So, it needs two more electrons in order to make it 8. So, it makes a bond with another oxygen atom and ...

2016年12月13日 · The Periodic Table lists just the symbol for one atom of each element. > The oxygen we breathe consists of molecules. Each molecule consists of two oxygen atoms joined together, so we write its formula as "O"_2.

2017年6月26日 · Because it fits the definition of molecule which is "two or more atoms of the same or of different elements bonded together". A molecule is two or more atoms of the same or of different elements bonded together with chemical bonds. Molecules may be simple (a few atoms) or complex (many atoms). When a molecule is formed of different elements, it is called a compound. Examples of molecules are ...

2018年11月25日 · Diamond and graphite are both arrangements of carbon atoms, each with very different properties and yet they are both pure carbon, as is a single carbon atom, of course. Likewise $\ce{O2}$ is as much oxygen as atomic oxygen is. The only complication is that what we habitually think of as oxygen is oxygen as a gas comprised of $\ce{O2 ...

2018年6月8日 · An electrically-neutral oxygen atom gains two electrons to form an oxygen ion with two negative charges. Notice how the charge conserves in this process. The two electrons will end up in the main energy level of the lowest potential energy possible- that is, closest to the atom- to minimize the potential energy of this atom.

2020年9月17日 · According to the MO diagrams, the bond order of $\ce{O2}$ is 2 and that of the cation $\ce{O2+}$ is 2.5 (after all, we are removing an antibonding electron). Indeed, the bond length of the cation is shown as smaller in this source. I did not find a bond length for the $\ce{F2+}$ species. This shows that you have to at least adjust the MO ...

2019年7月5日 · The size of an anion is greater compared to its parent atom because former's effective nuclear charge is lesser than that of latter. I found on wikipedia that the effective nuclear charge can be calculated by the formula: Zeffective = No. of protons in the nucleus - No. of non-valence electrons. For oxygen atom, the electronic config is: 1s2 ...

2018年1月16日 · If O has a charge of 2- then does O2 have a charge of 4-? ... where each oxygen atom is associated with 9 ...

2017年5月30日 · $\begingroup$ The 2 O represents two separate oxygen atoms, ( not connected to one another so free to move around and react independently ), the $\ce{O2}$ is molecular oxygen. $\endgroup$ – porphyrin