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32 Cards in this Set
- Front
- Back
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what is matter?
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term used to describe anythign that has a mass and take up space
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how can you seperate a mixture?
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filtering it, cooling it, sorting, heating
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difference between heterogenous and homogenous
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homo= same
hetero= different more than one |
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2 examples of elements
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liquid nitrogen
copper metal |
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what is a compound?
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substances made up of two or more elements that cant be septerated by physical needs
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what does it mean to displace something?
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To take the place of or push aside of
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difference between kinetic and potentional
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kinetic= motion
potentional= at rest |
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Elasticity
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measure of a solids ability to be stretched and returned to its original size
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tensile
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how much a pulling or tension a material can with stand until breaking
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brittleness
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materials tendecny to shatter upon impact.
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hardness
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solids resistance to scratching
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mallebility
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solids ability to be pounded into thin sheets
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hardest solid on earth?
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a diamond
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whats density?
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property that describes relationship between two measurements
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equation for density?
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D= m/v
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Archimedes princple
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force on an object exterted in a liquid is equal to the weigt of the fluid displace by the object
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Whats an atom?
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smalest particle of a element
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three subtomic particles of a element
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protons = positive
electrons= negative nertons = nerutral |
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where are electrons found?
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In the outter space around the nucleus
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who proposed the modern atomic theory?
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John Dalton
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Whats an isotpe?
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forms of the same element with different mass numbers
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Where are valence electrons located?
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Outermost region of the electron cloud
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how many electrons are in the first shell, and second?
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1st= 2
2nd=8 |
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how do you calculate the number of neutrons in an atom?
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Mass number - atomic number
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atomic mass of oxygen?
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16
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atomic number of carbon
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6
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electrons in neon
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10
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protons in silver
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47
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neutrons in chlorine
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35-17=18
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where are the alkai metals located?
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2nd column
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where are the noble gasses located?
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last column 15
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valence electrons in boron?
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3
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