CHEM 101 Lecture Notes - Francium, Trimethylarsine, Preferred Number
Document Summary
Chemists switch between the molecular view and the bulk view without a second thought. Note that chemists use the name of the element to mean relevant compounds containing the element. Some of the arsenic in food and drink is carcinogenic in humans. Fish contain the highest concentration of arsenic, but the compounds are not toxic. Rice contains the highest concentration of the toxic compounds. Atom: smallest stable structure having properties of the element. Element one of the 110 constituents of stable matter above the atomic scale. Molecule: a stable grouping of atoms each of which is connected to a small number (1-6) of other atoms. Ion: an atom of molecules that has gained or lost an electron. Electron: one of the three fundamental particles of chemistry. Atoms consist of protons, electrons and neutrons. Number of protons and number of electrons are equal. The number of protons is the atomic number.
