extreme delicacy or subtlety in action, performance, skill, discrimination, taste, etc. 2. skill in handling a difficult or highly sensitive situation; adroit and artful management: exceptional diplomatic finesse. 3. a trick, artifice, or stratagem.
For H2SO4 we have a total of 32 valence electrons. Put a pair between the atoms. We're forming chemical bonds here. We've used 8, 10, 12, and then around the outside to fill the octets on the Oxygens, 14, and 32.So this looks like a pretty good Lewis structure for H2SO4. In the H 2 SO 4 Lewis structure Sulfur is least electron electronegative atom and goes in the center of the Lewis structure. 2  When we have an H (or H2) in front of a polyatomic molecule (like CO 3, SO 4, NO 2, etc.) we know that it's an acid.
The carbon atom shares two pairs of electrons with each of the oxygen atoms, and each of these double bonds has a bond energy of 187 kcal (or about 93 kcal for each shared pair of electrons). The larger the bond energy, the more energy is needed to break the bond. The bond energy of H-H bonds is 103 kcal. 2  The bond energy of the O=O bonds is 116 kcal. 3  The decomposition of 2 molecules of water requires breaking 4 H-O bonds and thus the input of 440 kcal. 4  The formation of 2 moles of hydrogen yields 206 kcal (2 x 103). 5  The formation of 1 mole of oxygen yields 116 kcal.