Bond, chemical ionic

Two types of chemical bonds, ionic and covalent, are found in chemical compounds. An ionic bond results from the transfer of valence electrons from the atom of an electropositive element (M) to the atom(s) of an electronegative element (X). It is due to coulombic (electrostatic) attraction between the oppositely charged ions, M (cation) and X (anion). Such ionic bonds are typical of the stable salts formed by combination of the metallic elements (Na, K, Li, Mg, etc.) with the nonmetallic elements (F, Cl, Br, etc.). As an example, the formation of the magnesium chloride molecule from its elemental atoms is shown by the following sequence ... 

In Sections 9-3 and 9-4, we will show you two types of chemical bonds ionic and covalent. It is important to be able to represent compounds in terms of the atoms and valence electrons that make up the chemical species (compounds or polyatomic ions). One of the best ways is to use Lewis symbols and structures. 

There are two extreme cases of chemical bonding ionic and covalent. Ionic bonding occurs when there is a complete transfer of one electron from one atom to another to form ionsas in the equation ... 

In this chapter, we explored two types of chemical bonds ionic and covalent. Ionic bonds are formed when one or more electrons move from one atom to another. In this way, the atoms become ions—one positive, the other negative—and are held together by the resulting electrical attraction. Covalent bonds form when atoms share electrons. When the sharing is completely equitable, the bond is nonpolar covalent. When one atom pulls more strongly on the electrons because of its greater electronegativity, the bond is polar covalent and a dipole may be formed. 

As we discussed in chapter 2, there are two limiting kinds of chemical bonds ionic bonds and covalent bonds. The overarching driving force in formation of... 

The resulting substance is sometimes said to contain an ionic bond. Indeed, the properties of a number of compounds can be adequately explained using the ionic model. But does this mean that there are really two kinds of chemical bonds, ionic and covalent ... 

This paradox, of physics, is more apparent than real, and the chemists have persisted with the fiction that objects exist. The concept of a chemical bond, ionic, van der Waals, covalent, is taken for granted and is essential to chemistry. The first two make no sense except in the context of an infinite crystal. (An "ion pair" in solution, or a "hydrophobic bond" in water between two methane molecules is due to complex statistical mechanical solvent mediated association behaviom , to be discussed below.)... 

We have seen that there are two extreme kinds of chemical bonds ionic bonds, formed by the transfer of electrons, and covalent bonds, formed by the sharing of electrons. The physical properties of a compound depend largely upon which kind of bonds hold its atoms together in the molecule. 

Forces responsible Physical van der Waals Chemical bonds, ionic. 

In chapter 1, we discussed rather briefly in terms of Bohr orbits, two types of chemical bond—ionic and covalent. We saw that the essential picture was that of electron transfer in an ionic bond, and a sharing of electrons in a covalent bond. 

Lewis Symbols Principal Types of Chemical Bonds Ionic and Covalent Polar Covalent Bonding and Electronegativity... 

When two atoms are joined to make a chemical compound, the force of attraction between the two atoms is the chemical bond. Ionic bonding is characterized by an electron transfer process occurring before bond formation, forming an ion pair. In covalent bonding, electrons are shared between atoms in the bonding process. Polar covalent bonding, like covalent bonding, is based on the concept of electron shar-... 

The principle of a heterogeneous catalyst works by adsorbing a reactant (known as an adsorbate ) to the surface of the catalyst. This usually begins with a physisorption, which is a weak van der Waals interaction between the surface and adsorbate. To make the reaction possible, the adsorbate must get even closer to the catalyst, which occurs through chemisorption, a process that forms chemical bonds (ionic or covalent) between the surface atoms and the reactant. The key difference between physisorption and chemisorption is that the adsorbate and surface are unchanged in physisorption, as opposed to chemisorption, where the adsorbate undergoes a chemical reaction. 

LEWIS SYMBOLS AND THE OCTET RULE We begin with descriptions of the three main types of chemical bonds ionic, covaient, and metaiiic. In evaluating bonding, Lewis symbois provide a useful shorthand for keeping track of valence electrons. 

WHENEVER TWO ATOMS OR IONS are stropgly held together, we say there is a chemical bond between them. There are three general types of chemical bonds ionic, covalent, and metallic ( FIGURE 8-1). We can get a glimpse of these three types of bonds by thinking about the simple act of using a stainless-steel... 

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