BIOLOGY 1A03 Chapter Notes -Chemical Evolution, Hydrophile, Chemical Reaction

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Lovaye Kajiura

Document Summary

Chapter 2: water and carbon: the chemical basis of life. Building blocks of chemical evolution (atoms, ions and molecules: h, c, n, o make up 96% of all matter found in organisms biologist use a special unit dalton (da) for mass of (protons, neutrons =1da each) electrons. Pa1ern component: simple compounds formed complex compounds w carbon and accumulated in the ocean. Process component: complex carbon compounds formed bc of sunlight energy and hot. H2o formed chemical bonds (chemical energy) 2. 1 atoms, ions and molecules: the building blocks of chemical evolu-on. Dalton(da) measurement used to describe masses of protons, neutrons (1 da each) 2. 2 proprie-es of water. Cohesion: like mlcs binding. ex. Water stays together bc of h bonds. Water adheres to polar or charges mlcs. Meniscus: water concave down(happy) bc of cohesion and adhesion. Adhesion resist downward pull, instead bind to the glass. Water denser as a liquid than solid (hydrogen bonding)