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34 Cards in this Set
- Front
- Back
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the 118 pure substances that make up the universe are
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elements
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the smallest piece of an element is an
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atom
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general term for what everything is made of
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matter
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how much matter something has
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mass
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the substance made if different atoms that can be physically separated
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mixture
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a substance made of different atoms that can not be physically seperated
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compound
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a naturally charged particle
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neutron
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a negatively charged particle
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electron
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a positively charged particle
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proton
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the center of the atom is
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nucleus
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the number determining an atoms name
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atomic number
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the number describing how much an atoms weighs
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atomic mass
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when an atom has different number of neutrons than other of the same type its an
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isotope
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why don't electrons affect the atomic mass
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weigh nothing too small
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why is the atomic mass a decimal
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average of all isotopes in the world
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which particle most affects which group an element is in
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electrons
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which number in the lithium box is the atomic # the atomic mass
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1. top right 3
2. bottom right 6.94 |
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do atoms get heavier or lighter as they move across the periodic table as they go down
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heavier has they go down
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can you right a cool fact about 2 elements
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lithium fires can't be put out with fire just oils
and ? |
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how many electrons are in the outer shell of lithium
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1
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which particle determines which isotope an atom is in
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neutrons
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which particle determines the atoms identity
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protons
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which particle determines whether an atom is an ion or a neutral atom
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# of electrons
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which direction do the groups run on the periodic table
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vertical
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which 2 groups are the most reactive
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alkali metals (1) helogyns (7)
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which group isn't reactive
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noble gases (8)
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which particle influences which group an element is in
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electrons
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which group is a good conductors
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t ransistion metals
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which group is a good semi conductors
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metaloids
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which group contains s metals that are good for everyday use
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t ransistion metals
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which group contains solids liquids and gas as
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helogyns
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label the major groups of pt
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alkali metals(metals solids reactive soft and white) alkali earth metals(metals solids reactive 2 e) ransistion metals(metals solids good conductors 3-6 e) metaloids (metals solid semi conductors 7 e) helogyns gas liquid and solid very reactive 7e) noble gases( gas not reactive 8e) rare earth metals (metals solid laser magnets)
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how are these 3 lithium atoms different
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different # of neutrons protons and electrons stay the same
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what are the 6 major elements of life
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carbon hydrogen oxygen nitrogen phosphorus and sulfur
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