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25 Cards in this Set
- Front
- Back
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If mass is grams an volume is in milliliters, then density is in...
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g/mL
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What is an easy to find the volume of a small rock?
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Find the differences in water levels after putting rock into water.
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How do you find the mass of a liquid?
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Mass an empty container. Then mass it again with the liquid in it. Subtract masses.
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Which experiment involved discovering that an atom is mostly empty space and has a nucleus of positive charge?
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gold foil experiment
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Which experiment involved discovering a beam of negatively charged particles?
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cathode ray tube experiments
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What happens to temperature of a solid while it melts?
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stays the same
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What happens to the temperature of a liquid while it freezes?
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stays the same
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Is the freezing point for a substance the same as its melting point?
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Yes
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What does the top number mean in isotope shorthand?
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Atomic mass;
or number neutrons & protons |
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What does the bottom number mean in isotope shorthand?
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Number of protons;
or atomic number |
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Wht do you call atoms of the same element with different numbers of neutrons?
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isotopes
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When the number of protons is ONE more than the number of electrons, then the atom is now an ___ with a ____ charge
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ion
+1 |
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When the number of protons is TWO less than the number of electrons, then the atom is now an ___ with a ___ charge.
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ion
-2 |
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How do you determine the number of neutrons in an atom?
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Mass # - Atomic #
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What one name is given to particles in the nucleus of the atom?
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nucleons
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Which experiment involved discovering the amount of charge on an electron?
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Oil drop experiment
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Which subatomic particle has a negative charge and a mass of almost zero and takes up most of the space in the atom?
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electron
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Which subatomic particle has a positive charge and a mass of 1 unit and resides in the nucleus?
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proton
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Which subatomic particle has a zero charge and a mass of 1 unit and resides in the nucleus?
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neutron
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What are the 3 most common subatomic particles?
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proton, neutron, electron
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What is the smallest particle of an element that still has the properties of that element?
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atom
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Which subatomic particle determines the identity of an element?
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proton
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The mass number is the number of ___ + ____
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protons neutrons
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Charged atoms are called...
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ions
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The numbers at the tops of periodic table columns are called ___ numbers.
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Group numbers
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