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Peroidic Table Vocab
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Word | Definitions |
---|---|
Element | A pure substance that can't be broken down phisically or chemically |
Compound | Two elements combined |
Mixture | A substance that is phisically made up of 2 subtances |
Atom | The building blocks of matter |
Proton | A positivily charged partical in the nucleus |
Electron | A negitivily charged partical in the nucleus |
Neutron | A neutral partical in the nucleus |
Periodic | A regular repeating pattern |
Periodic Law | A law that states that the chemical and phisical properties of elements are periodic functions of their atomic number. |
Atomic Number | The amount 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 amount of neutrons. |
Valence Electron | Electrons in the outer orbital. |
John Dalton | Atomic Theory |
J.J. Thomson | Small particals in the atom |
Ernest Ruthford | Positive charged neucleus, atom mostly empty space. |
Neils Bohr | Electrons travel in the clouds |
Democritus | 1st to come up with an atom |
Dimitri Mendaleev | 1st to organize a periodic table. Arranged by AM |
Henry Mosely | Organized periodic table by Atomic Number |