CHEMICAL BONDING class notes

ChatGPT Chemical bonding refers to the attractive forces that hold atoms together in molecules and compounds. Understanding these bonds is crucial in explaining the properties of substances and their behavior in chemical reactions. Here are the primary types of chemical bonds: Ionic Bonds: Ionic bonds form between atoms when one or more electrons are transferred from one atom to another, creating ions (charged particles). These oppositely charged ions attract each other due to electrostatic forces. For example, sodium chloride (NaCl) forms when sodium (Na) loses an electron to chlorine (Cl). Covalent Bonds: Covalent bonds occur when atoms share pairs of electrons to achieve a stable electron configuration. This sharing can be equal (nonpolar covalent bond) or unequal (polar covalent bond), depending on the electronegativity difference between the atoms. Examples include water (H₂O), where oxygen and hydrogen atoms share electrons. Metallic Bonds: Metallic bonds are found in metals and alloys. In these substances, metal atoms share their electrons freely across a lattice structure, creating a "sea" of delocalized electrons. This sharing of electrons allows metals to conduct electricity and heat well and gives them their characteristic luster and malleability. Hydrogen Bonds: Hydrogen bonds are a special type of dipole-dipole interaction where hydrogen, covalently bonded to a highly electronegative atom (such as nitrogen, oxygen, or fluorine), forms an attractive interaction with another electronegative atom nearby. Hydrogen bonds are weaker than covalent or ionic bonds but play a crucial role in determining the structure and properties of molecules like water and DNA