Consider a bond triangle such as depicted on p. 197 in your text. Mark all the true statements below. (EN stands for electronegativity. AEN represents the difference in electronegativity between two elements.) Metals conduct heat and electricity because EN is low, and the electrons can move easily from atom to atom. Electrons in covalent compounds are localized, either on atoms or in bonds between atoms. That means the EN for atoms in covalent compounds must be high. For ionic compounds the AEN must be large, since one atom is an anion and the other is a cation. Electrons are localized in ionic compounds. Therefore the EN for atoms in ionic compounds must be high. Any molecule where the atomic ENs average out in the middle will be an ionic bond. Metals are used as structural components in buildings. This is because their EN is large. Because EN is small for metals, electrons can be passed around among atoms and are delocalized.
Types of Chemical Bonds
The attractive force which has the ability of holding various constituent elements like atoms, ions, molecules, etc. together in different chemical species is termed as a chemical bond. Chemical compounds are dependent on the strength of chemical bonds between its constituents. Stronger the chemical bond, more will be the stability in the chemical compounds. Hence, it can be said that bonding defines the stability of chemical compounds.
Polarizability In Organic Chemistry
Polarizability refers to the ability of an atom/molecule to distort the electron cloud of neighboring species towards itself and the process of distortion of electron cloud is known as polarization.
Coordinate Covalent Bonds
A coordinate covalent bond is also known as a dative bond, which is a type of covalent bond. It is formed between two atoms, where the two electrons required to form the bond come from the same atom resulting in a semi-polar bond. The study of coordinate covalent bond or dative bond is important to know about the special type of bonding that leads to different properties. Since covalent compounds are non-polar whereas coordinate bonds results always in polar compounds due to charge separation.
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