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The skeletal formula , also called line-angle formula or shorthand formula , of an organic compound is a type of molecular structural formula that serves as a shorthand representation of a molecule 's bonding and some details of its molecular geometry .. organic compound. organic compound. structural formula. structural formula. molecule. molecule. bonding. structural isomer. molecular geometry. molecular geometry. A skeletal formula shows the skeletal structure or skeleton of a molecule , which is composed of the skeletal atoms that make up the molecule .. molecule. molecule. skeleton. skeleton. It is represented in two dimensions , as on a page of paper .. It employs certain conventions to represent carbon and hydrogen atoms , which are the most common in organic chemistry .. carbon. carbon. hydrogen. hydrogen. organic chemistry. organic chemistry. The technique was developed by the organic chemist Friedrich August Kekule von Stradonitz .. Friedrich August Kekule von Stradonitz. Friedrich August Kekule von Stradonitz. Skeletal formulae have become ubiquitous in organic chemistry , partly because they are relatively quick and simple to draw .. organic chemistry. organic chemistry. They can be thought of as abbreviated Lewis structures observing the following conventions  : -LRB- 1 -RRB- a carbon atom is indicated as the terminus of a line segment or the meeting point of line segments ; -LRB- 2 -RRB- hydrogen atoms connected to carbon atoms are not shown but are implied , such that each carbons atom is bonded to the number of hydrogen atoms that would satisfy the octet rule , or otherwise maintain consistency with the formal charge and the number of explicitly indicated nonbonding electrons on the carbon ; -LRB- 3 -RRB- heteroatoms and hydrogen atoms attached thereto are shown as a single group -LRB- e.g. , OH , NH2 -RRB- without explicitly showing the heteroatom -- hydrogen bonds ; -LRB- 4 -RRB- nonbonding electron pairs on heteroatoms are optionally shown .. carbon. carbon. hydrogen. hydrogen. Lewis structures. Lewis structures. formal charge. formal charge. nonbonding electrons. Lone pair. As in a Lewis structure , a doubled or tripled line segment indicates double or triple bonding , respectively .. bonding. structural isomer. Although Haworth projections and Fischer projections look somewhat similar to skeletal formulae , there are differences in the conventions used , which the reader needs to be aware of in order to understand the details of a molecule .. molecule. molecule