CHEM 1001 Chapter : CHEM 1001 Ch 3
Document Summary
Rutherford gold foil experiment: in 1911, ernest rutherford published a paper in which he detailed his gold foil experiment. Use very thin sheets of target so it will not absorb. +1. 6*10^19 c and a mass= 1. 67262*10^-24 g: because protons and electrons have the same amount of charge, for the atom to be neutral there must be equal numbers of protons and electrons. Rutherford and chadwick proposed that there was another particle in the nucleus- it"s called an neutron: neutrons are subatomic particles. The atomic number tells you how many protons are in the nucleus and how many electrons are in the atom. Subatomic particles: proton, p+, mass of 1, charge of +1, location in the nucleus. Atomic structure: atomic number- the number of protons in a nucleus, mass number- the sum of protons and neutrons in a nucleus. Z: x= element symbol, a= mass number, z= atomic number.
