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.
Rigorously speaking the functional group is not the whole molecule but only that collection of atoms. that provides a specific chemical function. For example, the chemical family of alcohols is. characterized by the function of the hydroxyl (OH) group, and aldehydes, ketones are characterized. by carbonyl groups (C=O). There are various combinations of hydroxyl groups in molecules along.