CHEM 1A03 Lecture Notes - Lecture 4: Electron Affinity, Krypton, Bayerischer Rundfunk

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: Lydia Chen

Document Summary

Electrons can be excited to generate colours. Many compounds discovered or synthesized for the heavier elements (krypton and xenon), such as: Oxidation state of xenon even reaches +8 in some compounds, highly oxidizing. General stability of noble gases comes from their electron configurations where all subshells are completely filled. Atoms that do not have filled subshells try and fill them. Non-metals generally only lack 1, 2, or 3 electrons, thus they gain those to increase stability. Only require one electron to achieve noble gas configuration, thus high affinity. Going up from i br cl, solid liquid gas, ability to oxidize increases. Cl atoms can take elections from i ions to form i2 and cl ions. Br atoms cannot take electrons from cl ions (no reaction) High affinity causes vigorous reactions with alkali metals e. g. between na metal and cl gas to form. Have covalent bonding, thus rendering them acidic/form acidic solutions.