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Periodic Table Vocab

Some Words about the periodic table

WordDefinition
Element A pure substance that cannot be broken down chemically or physically.
Compound A substance that can be broken down chemically and is made up of 2 or more elements.
Mixture A substance made up of 2 or more substances that keep thier orginal identities.
atom The smallest particle that all things are made up of and cannot be broken down any smaller.
proton the positivly charged particle in an atom,found in the neucleus
electron negativly charged particle in an atom, located outside the necleus
neutron the particle in the neucleus of the atom with no charge.
periodic having a regular repeating pattern
perodic law chemical and physical properties of an atom go along with thier atomic number.
atomic number the number of protons in an atom.
atomic mass the combined number of protons and neutrons
isotope an atom of the same element with the same number of protons but a different number of neutrons
valence electron electrons in the outer orbital
John Dalton Atomic Theroy
J.J. Thomson Small Particles in atom
Ernest Ruthford Positive charged neucleus, atom mostly empty space.
Neils Bohr electrons travel in clouds
Democritus 1st to come up with atom
Dimitri Mendaleev First to organize a periodic table.Arraged by AM
Henry Mosely Organized periodic table by Atomic Number
Created by: Twilightprince13
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