The Answer is 4.....!
Carbon has four valence electrons. Each of theseelectrons can pair with an electron from another atom to form a strong covalent bond. In carbon, all the electrons with the principal quantum number 2 are valence electrons, but the two electrons with principal quantum number 1 are not.
Hydrazine has a total of 14 valence electrons - four from each nitrogen atom and one from each hydrogen atom.
Each atom of carbon can form up to four bonds, while each atom of hydrogen can form up to one bond.
The hybridization state of each carbon atom in nemotin is sp3.
The Carbon contributes 4 valance electrons and each oxygen contributes 6 valance electrons for a total of 16. Start by putting the Carbon in the middle of the two Oxygens. Each oxygen will have a double bond connecting it to the C in the middle. The left over valance electrons will be put on the oxygens. For drawing purposes you could put two dots on the top and two dots on the bottom of each oxygen. Since I can't draw it out for you here it will look roughly like this: ::O=C=O:: The only difference is that instead of having the four dots together on the Oxygens, like I said above, you would put two dots on the top and two dots on the bottom of each Oxygen. If you count the dots and bonds, each element has the 8 valance electrons that it wants and you have used all 16 that you needed to.
Helium has two valence electrons
atom
Carbon dioxide has a linear covalent structure, with two double bonds between the carbon atom and each oxygen atom. The carbon atom is in the center and is bonded to each oxygen atom through a double bond.
Carbon monoxide contain one atom of carbon and one atom of oxygen.
there are 8 electrons in the valence shell of neon
The electron pair geometry of each carbon atom in an alkane is tetrahedral. This is because each carbon atom is bonded to four other atoms, which results in a geometry where the electron pairs are distributed in a tetrahedral arrangement around the carbon atom.
A single (nonpolar) covalent joins the carbon atom to each of the hydrogen atoms.