CHEM 101 Lecture Notes - Lecture 4: Atomic Number, Ion, Alkali Metal

• School: Texas A&M University
• Department: Chemistry
• Course: CHEM 101
• Professor: Williamson Vickie

Document Summary

The periodic table is arranged by atomic number (# of protons). Diatomic atoms include: h, o, n, all members of group 7a. Hg and br exist as liquids at room temperature. 1st ionization energy- amount of energy required to remove the most loosely bound electron from an atom in its gaseous state. Electron affinity- defined as the amount of energy involved when an electron is added to an isolated gaseous atom to form an anion. Electronegativity- the tendency of an atom to attract electrons to itself.