3k. The covalent bonding in the carbon dioxide molecule
Doc Brown's Chemistry: Chemical Bonding and structure GCSE level, IGCSE, O, IB, AS, A level US grade 9-12 level Revision Notes
Covalent bonding diagram for CARBON DIOXIDE covalent molecule, molecular formula CO2
* metals \ non-metals (zig-zag line)
One atom of carbon (2.4) combines with two atoms of oxygen (2.6) to form the compound carbon dioxide CO2 (only the outer shell of carbon's electrons are shown).
Carbon is four electrons short of a full outer shell (8 electrons) and oxygen is two electrons short of a full outer shell (8 electrons), so one carbon atom shares its four outer electrons with two outer electrons from each of the oxygen atoms, so all three atoms now have a full outer shell of 8 electrons in the formation of two double bonds (O=C=O).
Electronically, carbon (2.4) becomes like neon (2.8) and oxygen (2.6), also becomes like neon (2.8), so the hydrogen and carbon atoms effectively have full outer shells in forming the covalent bonds when the atoms share their outer electrons.
(Lewis diagram of carbon dioxide) simplified 'dot and cross' electronic diagram for the covalently bonded carbon dioxide molecule.
is the full 'dot and cross' electronic diagram for the covalent bonding in the carbon dioxide molecule.
The electronic dot & cross Lewis diagrams for covalent bonding in carbon dioxide
The molecule can be shown as (displayed formula) with two carbon = oxygen double covalent bonds (Advanced note: called a linear shape, the O=C=O bond angle is 180o). Valencies of C and O are 4 and 2 respectively. The displayed formula
The carbon dioxide molecule is held together by the strong C=O carbon–oxygen double covalent bonds by sharing electrons.
|Website content © Dr Phil Brown 2000+. All copyrights reserved on revision notes, images, quizzes, worksheets etc. Copying of website material is NOT permitted. Exam revision summaries & references to science course specifications are unofficial.|
Doc Brown's Chemistry
Enter chemistry SEARCH words e.g. topic, module, exam board, formula, compound name, type of reaction, chemical structure, concept, equation, phrase, homework question, any question on anything of chemical interest!
TOP OF PAGE