To help students learn the appropriate text structures, text features, and language of informative/explanatory writing, teachers might begin with Talk-alouds. Below you will see two 2nd grade examples that focuses on the use of diagrams. These are a paired set of a Reading Talk-aloud and a Writing Talk-aloud.
functional group. n. An atom or group of atoms, such as a carboxyl group, in an organic compound that defines the structure of a family of compounds and determines the properties of the family. functional group. n.
Functional groups: Atoms or groups of bonded atoms that bond to carbon atoms to give rise to other families of organic compounds. A given functional group will generally undergo the same type of reactions regardless of the molecule in which it appears.When a functional group is bonded to an atom, it is called a substituent of that atom.thers: Molecules containing two alkyl groups bonded to the same oxygen atom. Epoxides: Ethers containing an oxygen atom bonded to two other carbon atoms in a three-membered ring. Carbonyls: Molecules containing one or more carbonyl groups.