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quiz 1-chemistry

chemistry the study of matter
atom basic unit of matter
dalton all elements are composed of invisible atoms all atoms of a given element are identical atoms of different elements are different(in mass) compounds are formed by the combination of atoms of different elements
electron negatively charged particles
nuetron neutrally charged particles
proton positively charged particles
"plum pudding model" the experiment where thompson discovered the electron
thomson scientist who discovered the electron
bohr discovered that the nucleas is made up of nuetrons & protons and electrons orbit them
rutherford discovered that the atom has a nucleaus and its postitively charged and that the vomlume is mainly empty
wave-mechanical model discovered that the electrons move in orbitals
greeks discovered that matter is composed of tiny,discrete particles
amu atomic mass unit
atomic number the number of protons in the atom
elements are substances that cant be broken down
compounds composed of 2 or more elements that chemically combined
mixtures combinations of 2 or more pure substances that can be separated by physical means
Created by: jriv