Old Rocks
Diamond Member
You have that right, Billy ol' Boob. You stated that the H2O molecule was ten times as large as the CO2 molecule. So, those of us that thought critically looked it up.
Water molecule structure
The electron density distribution for water is shown above right with some higher density contours around the oxygen atom omitted for clarity. The polarizability of the molecule is almost isotropic, centered around the O-atom (1.4146 Å3) with only small polarizabilities centered on the H-atoms (0.0836 Å3) [736]. Parameters using ab initio calculations with the 6-31G** basis set are shown right.b For an isolated H216O, H217O or H218O molecule, the more exact calculated O-H length is 0.957854 Å and the H-O-H angle is 104.500° (D216O, 0.957835 Å, 104.490°) [836]. The charge distribution depends significantly on the atomic geometry and the method for its calculation but is likely to be about -0.7e on the O-atom (with the equal but opposite positive charge equally divided between the H-atoms) for the isolated molecule [778d The experimental values for gaseous water molecule are O-H length 0.95718 Å, H-O-H angle 104.474° [64].e
molecules - What s the size of carbon dioxide - Physics Stack Exchange
The molecule is linear (all three atoms are in a co-linear line). The C=O bond is 116 pm, so the entire molecule (from centre of O to other O) is 232 pm. The extent in the other directions normal to the axis of symmetry is not well-defined as the electron cloud is diffuse and depends significantly on environment.
For those not literate in science or numbers, such as Billy Boob, 232 pm is 2.32 A
Water molecule structure
The electron density distribution for water is shown above right with some higher density contours around the oxygen atom omitted for clarity. The polarizability of the molecule is almost isotropic, centered around the O-atom (1.4146 Å3) with only small polarizabilities centered on the H-atoms (0.0836 Å3) [736]. Parameters using ab initio calculations with the 6-31G** basis set are shown right.b For an isolated H216O, H217O or H218O molecule, the more exact calculated O-H length is 0.957854 Å and the H-O-H angle is 104.500° (D216O, 0.957835 Å, 104.490°) [836]. The charge distribution depends significantly on the atomic geometry and the method for its calculation but is likely to be about -0.7e on the O-atom (with the equal but opposite positive charge equally divided between the H-atoms) for the isolated molecule [778d The experimental values for gaseous water molecule are O-H length 0.95718 Å, H-O-H angle 104.474° [64].e
molecules - What s the size of carbon dioxide - Physics Stack Exchange
The molecule is linear (all three atoms are in a co-linear line). The C=O bond is 116 pm, so the entire molecule (from centre of O to other O) is 232 pm. The extent in the other directions normal to the axis of symmetry is not well-defined as the electron cloud is diffuse and depends significantly on environment.
For those not literate in science or numbers, such as Billy Boob, 232 pm is 2.32 A