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PS- Atoms

Atoms, Elements, Compounds, and Mixtures

QuestionAnswer
Atom smallest particle of an element that can be combined with other atoms for form a molecule
Element matter that cannot be changed into a simple form by any ordinary physical or chemical change
Electron a small negatively charged subatomic particle
Proton a small positively charged subatomic particle
Neutron a subatomic particle with the same mass as a proton but no electrical charge
Atomic Number number of protons an atom of an element contains
Isotopes atoms of the same element that have different number of neutrons
Atomic Mass Number the number of protons and neutrons in an atom
Synthetic Elements elements that are not found in nature at all but are created in laboratories
Compound a substance made of 2 or more elements
Ion a charged particle formed when an atom or a group of atoms gains or loses one or more electron
Cation A positively charged ion (the atom lost an electron)
Anion a negatively charged ion (that atom gained an electron)
Ionic Compounds formed when a cation joins with an anoin
Dalton's Model all matter is made up of tiny individual particles; envisioned atoms as a sphere; atoms of each element are exactly alike but have different masses
Thomson's Model atoms not solid spheres, contained subatomic particles (electrons- do NOT move)
Rutherford's Model discovered protons and nucleus, electrons and protons evenly scattered throughought an atom; used gold sheet test
Bohr's Model defined locations of electrons, electrons must follow specific orbital patters called energy levels- planetary model
Electron Cloud Model electrons move about in an energy level with an ever changing pattern (blades of a fan)
Created by: kelsey09
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