CHEM 1100- Midterm Exam Guide - Comprehensive Notes for the exam ( 25 pages long!)
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2a= alkaline earth metals (not as reactive as 1a) F + 1e- ---> f: isotope: same el. w/ diff. 3 types of carbon: c-12: 6p, 6n, 6e (99%, c-13: 6p, 7n, 6e (1%, c-14: 6p, 8n, 6e (~0; radioactive, changing particles, change # of p+s= change identity, change # of n0s= isotope, change # of e-s= ion. Law of definite proportions: still have constant composition. Law of multiple proportions: elements may combine diff ratios to form diff cmpds, each w diff properties. Not on p table- graphite, diamond, and ozone. Combine 2 or more pure substances (**not chemically) H2, n2, o2, f2, cl2, br2, i2. C (s) + o2 (g) ---> co2 (g) Reaction: 4 al (s) + 3o2 (g) ---> 2al2o3 (s) Half reaction: al0 ---> al3+ + 3e-"s. Reaction: sio2 (s) + c (s)---> 2co(g) + si(s) Half reaction: si4+ + 4e- ---> si. Rxn: mg ---> mg2+ + 2e- Rxn: s + 2e- ---> s2-
