CHM 1100 Midterm: CHM1100 midterm 1 notes
10 Feb 2017
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Microscopic: the behaviours of atoms and molecules (interactions) Ex: rust (macroscopic property) = redox reaction involving iron ions and atoms, oxygen. Carbon= base of all organic matter molecules and water molecules (microscopic explanation) All matter is made of small, indivisible particles called atoms . Atoms of the same element are identical in mass and other properties, atoms of different elements are different. Atoms of different elements combine in simple, whole number ratios (e. g. 1:1 as in. Chemical reactions result in separation, combination, or rearrangement of atoms, but do not result in creation or destruction of atoms. Dalton the basic unit of an element that can enter into chemical combinations; atoms are small and indivisible. Thompson atoms contain negatively charged particles (electrons) Rutherford atoms contain a positively charged nucleus. Experiment ran by j. j thomson, cathode ray experiment. Conclusion: cathode rays consist of negatively charged particles with defined mass (charge-to-mass (e/m) of electron = -1. 759 x 10^8 c/g)
