NATS 1750 Lecture Notes - Lecture 2: Volcanic Glass, Ionic Bonding, Sulfur

• School: York University
• Department: Natural Science
• Course: NATS 1750
• Professor: Mary- Helen Armour

Document Summary

Rocks: most are an aggregate of minerals but they can be other things (like limestone or coal or volcanic glass, definition is a little more vague. Electrons transferred creating a negatively charged and a positively charged bond. Positive and negative then attract and combine. Example-table salt (hard, crystaline, rigid lines usually indicate ionic bond) Most organic chemicals have this type of bonding. Water is covalent molecule/compound: metallic, electrons loosely bound and move freely from atom to atom, metals happily all share electrons - sea of electrons . Results in highly conductive and ease with which metals bend (and other properties. ) In it"s pure form are very soft, shiny, distinct metallic appearance, highly conductive. Classifying minerals: physical properties, optical, this is how the chemicals in the mineral interact with light (can include non visible wavelengths like uv or infrared. Luster looks at how reflective a mineral is. Translucent some light can pass through. Elastic (will bend and return to original shape)