Introduction to organic chemistry GapFill

Organic molecules all contain the element carbon. It forms  fourtwothreeone covalent bond(s) in stable compounds. Organic molecules can be classified based on the atom or group of atoms that defines their chemical and physical properties − the   reactivebasicfunctionalfundamental group. Molecules in which this group is the same, and that differ only in the length of their carbon chain, form a   homologoushomomorphoushomogeneoushomolytic series. Consecutive members of these series differ only by a  CH4CH2CHCH3 group. The formula for a member of the series is called the   structuralmoleculargeneralempirical formula.

Organic molecules can be represented by various other types of formula too. Among these are: the simplest whole-number ratio of the elements in a molecule, the   skeletalempiricalstructuralmolecular formula; the actual number of atoms of each element in a molecule, the   molecularempiricalstructuraldisplayed formula; a representation of how atoms and groups are connected using mainly numbers and letters (and possibly some bonds), the   skeletalmoleculardisplayedstructural formula; a diagram showing all of the atoms and bonds in a molecule, the   displayedmolecularskeletalstructural formula; and a simpler diagram that omits most of the hydrogen atoms, the   skeletalempiricalstructuralmolecular formula. Molecules with the same molecular formula but a different structural formula, or the same structural formula but a different arrangement of atoms in space, are called   isotopesisotypesisomersisomates.