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Atom words Word Scramble

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word	definition
element	a puresubstance that can not be broken chemicaly or phyisacl means
compound	a pure substance coposed of two or more elements that are chemically combined
mixture	a combination of two or more substaces not combined chemically
atom	the smallest particle into which an element can be divided and still retain all of the properteis of that element
proton	the positively charged particles of the nucleus
electron	the negativly charged particles found in the nucleus
neutron	the particles of the nucleus that have no charge
periodic law	a law that states that the chemical and physical properties of elements are periodic functions
atomic numbers	the number of protrons in the nucleus
atomic mass	the weighted average the masses of all naturaly occuring isotopes of an element
isotope	atoms that have the same nuber of protrons but difrent number of nutrons
valence electrons	the electrons in the outermost enrgy level of the atom
john dalton	atom theory
JJ Thomson	small particles in atom
ernest rutherford	positive charged nucleus, atom mostly empty space electrons travel around nucleus
niels bohr	electrons travel in clouds
democritus	1st to come up with idea of atom
dmiti mendelev	father of the periodic table, arrange elements by atomic mass
henry moseley	reaganged periodic table ny atmoic number