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A plastic ball-and-stick model of proline. These models usually comply with CPK coloring. These models usually comply with CPK coloring. In chemistry , the CPK coloring (for Corey – Pauling – Koltun ) is a popular color convention for distinguishing atoms of different chemical elements in molecular models .
A plastic ball-and-stick model of proline. In chemistry, the ball-and-stick model is a molecular model of a chemical substance which displays both the three-dimensional position of the atoms and the bonds between them. [1] The atoms are typically represented by spheres, connected by rods which represent the bonds.
A modern plastic ball and stick model. The molecule shown is proline. The model shown to the left represents a ball-and-stick model of proline. The balls have colours: black represents carbon (C); red, oxygen (O); blue, nitrogen (N); and white, hydrogen (H).
Ball-and-stick model of the methane molecule, CH 4. Methane is part of a homologous series known as the alkanes, which contain single bonds only. In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. [1]: 620 Hydrocarbons are examples of group 14 hydrides.
Ball and stick – atomic nuclei are represented by spheres (balls) and the bonds as sticks. Spacefilling models or CPK models (also an atomic coloring scheme in representations) – the molecule is represented by overlapping spheres representing the atoms.
A molecule of pamidronic acid, as drawn by the Jmol program. Hydrogen is white, carbon is grey, nitrogen is blue, oxygen is red, and phosphorus is orange. In the ball-and-stick model, atoms are drawn as small sphered connected by rods representing the chemical bonds between them.
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Hofmann's 1865 stick-and-ball model of methane CH 4. The basis of this model followed the earlier 1855 suggestion by his colleague William Odling that carbon is tetravalent. Hofmann's color scheme, to note, is still used to this day: carbon = black, nitrogen = blue, oxygen = red, chlorine = green, sulfur = yellow, hydrogen = white. [14]