Chemistry

Solids


First, common properties of crystalline substances and their crystallographic systematization are considered. In connection with the manifestations of the chemical bond and the intermolecular interactions, typical representatives of metallic, ionic, covalent and molecular solids are treated with regard to their structures and their macroscopic-physical properties.

Solids

Introduction 30 min.

In this learning unit, the states of aggregation are described, followed by an overview of the systematics of solids.

Amorphous and crystalline structures30 min.

Solids can be in the crystalline or amorphous state. In the crystalline state there is a recognizable, repeating order in which the individual particles are arranged. In the amorphous state there is only one local order. Otherwise no order of the particles can be seen. In this learning unit the differences between the amorphous and the crystalline state are explained. It also explains the difference between isotropy and anisotropy.

The seven crystal systems 45 min.

Description of the seven crystal systems with the help of movable graphics (the images can be moved with the mouse button held down!)

Crystal structure analysis 45 min.

Introduction to crystal structure analysis. Differentiation between different crystal structure analysis methods.

Ion crystals 60 min.

Different ion crystals are presented. It also explains the difference between isotype and isomorphism.

Atomic crystals 45 min.

The various crystal structures of the atomic crystals are described. In the following, the electrical conductivity of atomic crystals is dealt with and the terms insulator and semiconductor are explained.

Molecular crystals 45 min.

Molecular crystals, inclusion compounds, salt hydrates and the structure of ice are covered.

Tutorial

Solids

First, common properties of crystalline substances and their crystallographic systematization are considered. In connection with the manifestations of the chemical bond and the intermolecular interactions, typical representatives of metallic, ionic, covalent and molecular solids are treated with regard to their structures and their macroscopic-physical properties.


Video: States of matter for kids - What are the states of matter? Solid, liquid and gas (December 2021).