Solids | Typical properties of solids | ch#5 | 9th Class chemistry

#9thclasschemistry #mpluschemisty 9th class chemistry online chemistry lecture 9th class 9th class chemistry lecture class 9 chemistry matric part 1 chemistry online lecture of chemistry 9th class physical states of matter in class 9 chemistry class 9th chemistry lecture series class 9 chemistry 9th class chemistry chapter 5 5.4 TYPICAL PROPERTIES OF SOLIDS Solids exhibit typical properties, a few of which are discussed here. 5.4.1 Melting point The temperature at which the solid starts melting and coexists in dynamic equilibrium with liquid state is called melting point. The ionic and covalent solids make network structure to form macromolecules. So all such solids have very high melting points. 5.4.2 Rigidity The particles of solids are not mobile. They have fixed positions. Therefore, solids are rigid in their structure.