- \(C_{12}H_{22}O_{11}\) is an organic compound.
- \(Mg(OH)_2\) is an ionic compound.
- \(H_2O\) is a covalent compound.
- \(Cu_3Zn_2\) is a metallic compound (alloy).
- \(Au\) is a chemical element.
Explanation
- Analysis and Classification of Chemical Formulas
To determine the compound type for each formula, we analyze the atomic composition and bonding characteristics of each substance.
- \(C_{12}H_{22}O_{11}\): This formula represents a carbohydrate (such as sucrose). Because it consists primarily of carbon and hydrogen atoms bonded covalently with oxygen, it is classified as an organic compound.
- \(Mg(OH)_2\): This substance consists of a magnesium cation (\(Mg^{2+}\)) and two hydroxide anions (\(OH^{-}\)). The strong electrostatic attraction between these oppositely charged ions characterizes it as an ionic compound.
- \(H_2O\): This molecule is formed by hydrogen atoms sharing electrons with an oxygen atom. Since it is formed by sharing electrons between non-metal atoms, it is classified as a covalent (or molecular) compound.
- \(Cu_3Zn_2\): This substance is formed by combining two transition metals, copper (Cu) and zinc (Zn). A mixture or combination of metallic elements is characterized as a metallic compound or an alloy.
- \(Au\): This symbol represents gold, which consists only of gold atoms. Since it is composed of only one type of atom and cannot be broken down by chemical means, it is a chemical element.
Examples
Chemical classification is foundational in fields like material science and pharmacy. For example, identifying if a medicine is an organic compound can determine its solubility in the body, while recognizing a substance like an alloy (similar to \(Cu_3Zn_2\)) helps engineers choose materials for strength and conductivity in electronics. Understanding these distinctions allows scientists to predict how substances will behave in various environments and chemical reactions.