Indicate the type of solid (molecular, metallic, ionic, or covalent-network) for each compound: (c) Ta2O5 (melting point, 1872°C)

Verified step by step guidance

1. Identify the elements present in Ta2O5: Tantalum (Ta) and Oxygen (O).
2. Consider the nature of the bond between Ta and O. Tantalum is a metal and oxygen is a non-metal, suggesting ionic character.
3. Evaluate the melting point: A high melting point (1872°C) is characteristic of ionic or covalent-network solids.
4. Consider the structure: Ta2O5 is likely to form a lattice structure typical of ionic compounds.
5. Conclude that Ta2O5 is an ionic solid due to the metal-nonmetal combination and high melting point.

Key Concepts

Types of Solids

Solids can be classified into four main types: molecular, metallic, ionic, and covalent-network. Molecular solids consist of molecules held together by intermolecular forces, metallic solids are composed of metal atoms sharing electrons, ionic solids are formed from the electrostatic attraction between oppositely charged ions, and covalent-network solids consist of a continuous network of covalent bonds.

Ionic Compounds

Ionic compounds are formed when metals transfer electrons to nonmetals, resulting in the formation of positively and negatively charged ions. These ions are held together by strong electrostatic forces, leading to high melting and boiling points. The structure of ionic compounds is typically crystalline, and they often dissolve in water, conducting electricity in solution.

Melting Point and Bonding

The melting point of a solid is indicative of the strength of the forces holding its particles together. Higher melting points generally suggest stronger bonding interactions. For example, ionic compounds like Ta2O5 exhibit high melting points due to the strong ionic bonds between the Ta and O ions, reflecting their stability and the energy required to break these interactions.