Unit C Study Guide

Discontinuous Theory of Matter
matter is made up of particles so small and indestructible that they cannot be divided into anything smaller
Law of Conservation of Mass
matter is neither created nor destroyed
Law of Definite Proportions
the proportions of mass (% composition) of the elements in a SINGLE given compound is always the same
Law of Multiple Proportions
if two or more different (read multiple) compounds are composed of the same two elements, the ratio of the masses of the second element that combines with a certain mass of the first element will always be a whole number ratio
Dalton's atom
Dalton’s atom
Thomson's atom
Thomson’s atom
Rutherford's atom
Rutherford’s atom
Bohr's atom
Bohr’s atom
Current atom
Current atom
Cathode Ray Experiment
Cathode Ray Experiment
Gold Foil Experiment
Gold Foil Experiment
Mass number
is the total number of particles in the nucleus
Atomic mass
Atomic mass
the mass of the atom
Atomic Number
Atomic Number
the number of protons (and electrons) in an atom
Isotopes
atoms of the same element that have different numbers of neutrons