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20 Cards in this Set
- Front
- Back
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what is the smallest unit of mater?
What is it composed of? |
Atom
Electrons, protons (+), Neutrons (unchanged) |
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What moves around the nucleus in patterns known as ________ configuration.
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electron
very small - charge |
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positive charge in the nucleus
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protons
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what are unchanged and have the same number of protons in the nucleus
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neutron
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Each element has a different number of what?
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protons
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are atoms with different number of neutrons
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isotope
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number of protons (subscript left)
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atomic number
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number of protons (superscript left)
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atomic weight
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sum of all atoms making up the molecule
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molecular weight
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a word for
6.022 x 10 23power |
mole
same as 1 dozen =12 same number as the molecular weights - ie molecular weight of water is 18..1 mole of water is 18g |
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When the outer-most energy level of an atom is not completely filled by electrons, you thinking of it as having unfilled spaces or extra electrons. Atoms combine to compelete the outer-most shell. The number of missing or extra electrons in this shell is the ?
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valence
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Have different protons and neutrons.
gain electron - charged called? lose electron + charge called? |
ion
anion (-) cation (+) |
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one or two molecules with the same chemical formula but different structures
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isomer
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hydrogen bond
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Hydrogen bond forms when a hydrogen atom covalently bonded to an O or N . Because O or N is bigger , attacts more electrons.
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What the 4 most common element in living things?
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02, hydrogen, carbon , nitrogen
ohcn |
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Why do atoms enter chemical reactions to make molecules?
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make chemical building blocks that are used for growth and all other funcitons essential to life.
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Does the energy level increase or decrease the farther the electron shell is from the nucleus?
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increase
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What does every electron shell
want? |
electrons
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Organic vs inorganic?
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organic contains carbon and hydrogen together- usually very complex-
inorganic - does not contain C & H - water, O2, minerals |
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Endergonic vs exergonic
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endo take in - absorbs energy
ex - go out -reaction release energy bond is broken |
