Classify each of these solids. CaCl2, C(diamond), Ca, FCl

ionic-molecular
metallic-covalent

#1

Classify each of these solids. CaCl2, C(diamond), Ca, FCl.
Answers can be ionic, molecular, metallic, or covalent.

Concepts and reason
Ionic solid: Ionic solids have positive and negative ions. These ions are held together by electrostatic attractions.

Molecular solid: a solid composed of molecules that are held together van der Waals forces is called as molecular solid. Molecular solid is connected by London dispersion forces, dipole-diploe forces, or hydrogen bonds.
Metallic solid: In metallic solids metal atoms are connected by metallic bonds.
Covalent solid: A solid in which atoms are bonded with covalent bonds is called as covalent solid.
Identify the nature of the bonds involved in the each solid. Based on the bonding nature classify them into suitable solid.

Fundamentals
Metallic solid are good conductors of electricity and they are malleable in nature. Ionic solids are characterized by low melting points and brittle in nature. Whereas covalent solids are characterized by very high melting points and very hard.
Molecular solid are poor conductors of electricity and flexible in nature.

Answer:

The solid image is ionic solid.

In the image, chlorine has more electro negativity and calcium has low electronegativity. Due to this significant difference in the electronegativity the solid forms positive and negative ions. Thus,image is ionic in nature.

The solid image is covalent solid.

In the ![image|88x27](upload://leJVPqRqZ7geWEwNW3W2ixhXwv4.jpg, carbon atoms are strongly bonded together by covalent forces tetrahedrally. Due to covalent bonding (covalent interactions) between the carbon atoms the nature of the solid would be covalent. So,![image|88x27](upload://leJVPqRqZ7geWEwNW3W2ixhXwv4.jpg is a covalent solid.

Calcium is a metallic solid.
Calcium is metal in nature. Calcium atoms are bonded with metallic bonds in the solid. In these solid, individual calcium atoms will be occupied in the lattice sites of crystal and leaves their electrons around the lattice. The freely moved valance electrons forms an electron cloud that is called as electron sea. The nature of the solid is metallic.

The solid FCI is a molecular solid.

The solid FCI will be formed by interaction between fluorine and chlorine atoms. The molecules are involved in the intermolecular forces like van der Waals forces. Non-covalent interactions are involved in the solid.Thus,FCI the is molecular solid.