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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Definitions:
1. Exothermic 2. Endothermic |
1. Heat leaving (explosion)
2. Heat entering (baking pie) |
ex..
EXIT |
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How do you get neutrons
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Atmic mass - Protons
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something - something
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what does AMU stand for?
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the number of neutrons... I think
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Atomic...
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What do the molecules do to go from a solid to gas?
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vibrate>sliding>fills contianer to the max
fixed shape>shape of container>fills container particles close>particles less close:more space, particles are far apart |
ice>water>air
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Matter is anything that has ___________ and __________
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Volume(space) and Mass
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V
M |
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What is a physical change?
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the appearance of a substance changes but no new substances are produced
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cutting wood
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What is a chemical change
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cause one or more new substances to be formes
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burning wood
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The nucleus contains...
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Protons and Neutrons
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P
N |
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Why do we use chemical sumbols?
(symbols for elements in the periodic table) |
1. they are shorter, easier to use
2. the symbols are universal and used accross the words in all languages |
:)
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Do protons and neutrons have the same mass?
(true or false) |
True
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T or F
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How many approximate elements are there?
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116
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over 100
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Can an Atom hold a charge?
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No.
If an atom has a charge, it isn't an atom.. it is an Ion. Something is only classified as an atom if it has a net neutral charge (0) |
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How many electrons can each shell hold?
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Shell 1. 2
2. 8 3. 8 4. 18 (and 18 for the rest) |
the first one is two
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Does a full valence shell make an atom unstable?
(true or false?) |
No, it makes an atom stabler)
stable-er |
maybe
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what are reactants?
products? |
in a chemical chemical change the starting substances that react are called reactants and the substances that result are called products
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what is the kinetic molecular theory?
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an explanation of the behavior of particles in matter
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3. Earnest Rutherford
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-most of the atom is empty space
-came up with nucleus which contains protons and neutrons -gold foil |
nucleus
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4. Neils Bohr
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-came up with energy levels
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clouds
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1. John Dalton
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-all matter is made of atoms
-atoms cannot be created or destroyed or divided into smaller pieces -all atoms from an element are identical but are differenct from the atoms of other elements |
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2. JJ Thompson
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-atoms contain negatively charged particles (later called electrons)
-Raisin Bun Model |
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WHAT IS THE KINETIC MOLECULAR MODEL????
4 parts |
1. all matter is made up of very small particles
2. There are spaces between these particles 3. the particles that make up matter are allways moving 4. the particles are are attracted to one another. the strength of attraction depends on the type of particle |
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