CHEM 1210 Chapter Notes - Chapter 2: Atomic Nucleus, Sodium Chloride, Chemical Formula

• School: Ohio State University
• Department: Chemistry
• Course: CHEM 1210
• Professor: Kroner Steven

Document Summary

Law of conservation of mass: total mass of materials present before a reaction is equal to the total mass of materials present after the reaction, Law of multiple proportions: if two elements combine to form more than one compound, the masses of element 1 that can combine with a given mass of element 2 and in the ratio of small whole numbers. Atoms are neither created nor destroyed in chemical reactions: compounds are formed when atoms of more than one element combine. A given compound always has the same relative number and kind of atoms. Cathode rays: radiation produced by electrodes which allowed j. j. thomson to discover the electron in 1897. Found uranium to be a source of radiation. Ernest rutherford found three types of radiation: alpha, beta, gamma: alpha and beta rays consist of fast moving particles. Ele(cid:272)tro(cid:374)s are o(cid:374)l(cid:455) a (cid:448)er(cid:455) s(cid:373)all portio(cid:374) of the ato(cid:373)"s (cid:373)ass.