After the noble gases you start a new row of valence electrons and designate the inner core by saying [He], [Ne], and so forth as you move down the row of the periodic table. Calculate the total valence electrons in the molecule. So we have a Carbon and an Oxygen atom bonded together. Therefor with Cobalt you have the electron configuration as [Ar] 4s2 3d7. Occurs in compounds with arsenic, oxygen and sulfur as in cobaltine (CoAsS) and linneite (Co 3 S 4). Each square on the periodic table contains the letter symbol for an element printed directly below the atomic number of the element. Primary mining areas are in Zaire, Morocco, Sweden and Canada. Annual world production is around 17,000 tons. There are ONLY 2 valence electrons in Co, valence electrons come only from the s orbital and the p orbital, giving only 2 for Cobalt. We have 4 valence electrons for Carbon and 6 for Oxygen, for a total of 10 valence electrons. Transcript: This is the CO Lewis structure: Carbon monoxide. We'll put 2 electrons between the atoms to form a chemical bond, that's 2; and then around the outer atoms, that's 4, 6, 8, and 10. Students are typically taught an electron-counting method, which goes as follows: Count the number of valence electrons per atom. Problem: Give the number of valence electrons for cobalt (Co).a. Accordingly, valence electrons directly influence how elements behave in a chemical reaction. The prefix co-means jointly, associated in action, partnered to a lesser degree, etc. C => 4 O => 6 (but there are two oxygens) =>12 4+12 = 16. C = 4. Just add up the valence electrons in each atom and then adjust to match the charge if any. ( hydrogen octet state is 2) 7 [math]CO_2[/math] has no charge so just add the valence electrons on each atom. 9e. Finding Valence Electrons for All Elements Except Transition Metals. This often looks wrong to a student who is used to seeing double bonds on oxygen. Annual world production is around 17,000 tons. ; thus a "co-valent bond", in essence, means that the atoms share "valence", such as is discussed in valence bond theory. Locate the desired element on the periodic table. 2d. 18b. H:1x2=2 C:4 O:6. Where there are electron pairs, construct one bond line for each electron pair. 27c. Put carbon in the center and arrange hydrogen and oxygen atoms on the sides.Arrange electrons until both carbon and oxygen get 8 electrons. The letter represents the type of shell in which the electrons sit, while the final number denotes the number of electrons in the shell. We just add the valence electrons of each atoms involved. In the molecule H 2, the hydrogen atoms share the two electrons via covalent bonding. Place all electrons in predicted spots. These are your valence electrons. Two electrons in the S-orbital and 7 in the D-orbital. Draw out a predicted atom connectivity. Total=12. Lewis dot structure of H 2 CO. Alternatively a dot method can be used to draw the lewis structure. There are 7 valence electrons because the highest energy level, 3, has 7 total electrons (5 plus 2 is 7).