CHEM 121 Lecture 2: CHEM 121 lecture 2
79
CHEM 121 Full Course Notes
Verified Note
79 documents
Document Summary
Chem 121 - lecture 2 chapter 2 (chemical bonding and lewis structures) Polar covalent bonds electrons are not shared equally in heteronucleur diatomic molecules to form a polar bond. The electrons are shared unequally between the the atoms: in the compound, one atom has a partial positive charge while other has a partial negative charge. Non-polar bonds electrons are shared equally between the atoms in homonuclear diatomic molecules. Electronegativity it is the tendency of an atom in a molecule to attract electrons to itself. Fluorine is the most electronegative while francium is the least. Lewis structure of polyatomic species: arrangement of atoms help us determine the chemical reactivity and physical properties of chemical compounds. Octet rule a complete octet is the state that second period atoms try to to reach by sharing their electrons with each other. They can never have more than 8 electrons in their valence shell. Compounds with not an octet are called electron deficient .
