CHE 106 Lecture Notes - Lecture 16: Bond Length, Principal Quantum Number, Covalent Bond

• School: Syracuse University
• Department: Chemistry
• Course: CHE 106
• Professor: J.French

Document Summary

Elements within a given family (group) have similar configurations. Elements in the same group generally have similar c hemical properties. Physical properties are not necessarily similar, but they tend to be. We will look at 3 different periodic properties. As you move right to left, atomic radius increases. Principal quantum number, n : n determines the size of our orbitals (as n increases, atomic radii increases) Effective nuclear charge (z eff ) : positive charge of attraction an electron feels . Two factors determine the size of an atom from the nucleus. Increase from top to bottom in a group. Increase from right to left in a row. This is due to effective nuclear charge. In an atom with multiple negatively charged electrons, the electrons are influenced by. Combined effects dictate what the electron experiences ( feels ) Where z is atomic number, and s is the screening constant (usually close to the number of inner electrons)