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23 Cards in this Set
- Front
- Back
What are four fundamental elements?
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Air; Earth; Fire; Water
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What is the smallest particle of matter?
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Atom
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The idea that matter is made of fundamental particles called atoms is know as what?
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Atomic Theory
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What did Lavoiser concluded?
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He concluded that when a chemical reactions occurs, matter is niether created nor destroyed but only changed.
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What was lavoiser conlusion became known as?
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His conclusion became known as Laws of Conservation Matter or Mass.
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What is Law of Definite Porportion?
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Is when elements that compose the compounds are always in a certain porportion by mass.
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What is all matter made of?
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Atoms
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Can atoms be divided into smaller particles?
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NO
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What is a hypothesis?
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A hypothesis is a testable prediction to explain the observations.
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What is a theory?
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A explanation based on many observations and supported by many results of investigations.
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What is a summarized systematic approach used to answer questions and solve problems?
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Scientific Method
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What is a Scientific Law?
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The fact of nature that is observed so often that it becomes accepted as the truth.
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What is a negatively charged particle?
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Electron
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What is a a positively charged subtomic particle?
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Proton
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What two subtomic particles are equal but are oppisites?
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Electron and Protons
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What are atoms of an element that are chemically alike but differ in mass?
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Isotopes
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What is a nuetral particle?
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Nuetron
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What is a small, dense, postively charged Central Core?
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Nucleus
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Atomic Number
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The number of protons in the nucleus of an atom of that element. Top Right Corner.
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Mass Number
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The sum of protons and nuetrons
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Energy Level
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The region of space in which electrons move about the nucleus.
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Electron Cloud
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The space around a nucleus of an atom were the electrons are most likely to be found.
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What are the electrons in the outermost energy level?
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Valence Electrons
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