CHEM 1201 Chapter : Chapter 2
Document Summary
Atoms, electrons, and protons: atoms, electrons = 1/2000 amu, protons = 1 amu, electrons = 1 amu. Atoms and elements: all atoms of the same element will have same number of protons, the number of protons determines the element. Isotopes: definition: atoms with different masses due to the number of neutrons, average mass = (abundance-%)(isotope mass, mass number, recall that each proton and neutron is approximately equal to. 1 amu and mass number is the mass of protons and neutrons: therefore, subtract proton number from mass number to find how many neutrons are present, (%1)(mass1) + (%2)(mass2) = average mass. Ions: definition: charged atoms or molecules, anion = negative charge, atom = neutral charge, cation = positive charge. 2 sulfate: oh- hydroxide, no3, no2, so3, so4, hso4, co3, po4, hco3, clo- hypochlorite, clo2, clo3, clo4, cn- cyanide, nh4, hg2, ch3co2, hpo4, h2po4, mno4, cro4, cr2o7, s2o3. 2 peroxide: o2, o2 superoxide.
