CM-UY 1004 Lecture Notes - Lecture 4: Stoichiometry, Hexa, Oxoacid
21 Sep 2017
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Document Summary
Conversion factors are precise so they have an infinite number of significant figures. Elements are composed of small particles called atoms. atoms of a given element are identical with the same size mass, and chemical properties. Atoms of different elements are different from other atoms. Compounds: composed of atoms of more than one element new material. Chemical reactions atoms of cone element rearrange the way they are attached, they don"t change elements. Glass tube containing metal electrodes which almost all air has been excavated. Ray bends towards positive plate in electrical field. When plates aren"t charged the rays go straight across. Rays emitted by radioactive elements: alpha ()+, beta ((cid:533)) -, gamma ((cid:534)) neutral. Ernest rutherford"s gold foil experiment: atom must have a positive center to explain the. proton (p) has opposite charge of electron deflected particles nucleus. Isotopes: atoms of same element (x) with different mass numbers different number of neutrons. Families (horizontal columns) similar families similar characteristics.
