Textbook Question
Complete the table by filling in the formula for the ionic compound formed by each pair of cations and anions, as shown for the first pair. Ion Na+ Ca2+ Fe2+ Al3+ O2- Na2O NO3- SO42- AsO43-
Ch.2 - Atoms, Molecules, and Ions
Chapter 2, Problem 65e
Predict whether each of the following compounds is molecular or ionic: (e) TiCl4
Verified step by step guidance1
Identify the types of elements in the compound: TiCl4 consists of titanium (Ti) and chlorine (Cl). Titanium is a metal, and chlorine is a nonmetal.
Understand the nature of bonding between metals and nonmetals: Typically, compounds formed between metals and nonmetals are ionic due to the transfer of electrons from the metal to the nonmetal.
Consider the oxidation states and electron configuration: Titanium in TiCl4 generally has an oxidation state of +4, and chlorine has an oxidation state of -1.
Analyze the compound's structure and properties: TiCl4 is a compound where titanium is surrounded by four chlorine atoms. Despite the typical ionic character between metals and nonmetals, the high oxidation state of titanium and the covalent character of the Ti-Cl bonds suggest a more complex bonding.
Conclude the type of compound: Given the covalent nature of the bonds and the molecular structure, TiCl4 is best classified as a molecular compound rather than an ionic compound.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Ionic vs. Molecular Compounds
Ionic compounds are formed from the electrostatic attraction between positively and negatively charged ions, typically involving a metal and a non-metal. In contrast, molecular compounds consist of molecules formed by covalent bonds between non-metal atoms. Understanding the distinction between these two types of compounds is essential for predicting their properties and behaviors.
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Metal and Non-Metal Classification
In the periodic table, metals are generally found on the left side and non-metals on the right. The classification of elements as metals or non-metals helps determine the type of bonding that will occur when they combine. For example, titanium (Ti) is a metal, while chlorine (Cl) is a non-metal, which suggests that their combination may lead to ionic bonding.
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Valence Electrons and Bonding
Valence electrons are the outermost electrons of an atom and play a crucial role in chemical bonding. The number of valence electrons determines how an atom interacts with others, including whether it will lose, gain, or share electrons. In the case of TiCl4, the valence electron configuration of titanium and chlorine will influence whether the compound forms ionic or covalent bonds.
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