Ch2 Part1 Basic Chem
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| anything that occupies space and has mass | Matter
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| equal to matter in the object | mass
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| remains constant regardless of gravity | mass
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| solid, liquid, gas | three states of matter
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| the capacity to do work, and exists in two forms | energy
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| energy of motion | kinetic
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| stored energy | potential
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| chemical, electrical, mechanical, radiant | four types of energy
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| energy stored in chemical bonds | chemical energy
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| results from the movement of charged particles | electrical
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| energy directly involved with moving matter | mechanical
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| energy that travels in waves | radiant
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| energy is... | easily converted from one form to another
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| substances that cannot be broken down into simpler substances by ordinary chemical means | elements
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| carbon, hydrogen, nitrogen, oxygen | make up roughly 96% of body weight
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| smallest particle of element retain characteristics of element | atoms
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| elements are designated by.. | 1, 2, or 3 letter abbreviation called the atomic symbol
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| each atom has a central -packed with protons and neutrons | nucleus
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| positive charge weighs 1 amu | proton
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| no charge weighs 1 amu | Neutrons
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| found around the nucleus negative charge weightless | electrons
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| protons= | electrons
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| atoms are electrically.. | neutral
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| 2D model of atomic structure | Planetary model
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| 3D model talking about orbital regions, not orbital patterns | orbital model
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| elements are identified based on | their number of protons, electrons, neutrons
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| atomic number= | # of protons in an element
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| same number of protons and electrons of the same element | isotopes
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| average of the relative weights of all isotopes of an element | atomic weight
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| heavier unstable isotopes of an element that spontaneously decompose into more stable forms | radioisotopes
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| time required for a radioactive isotope to lose 1/2 of it's radioactivity | half-life
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| combination of 2 or more atoms | molecule
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| 2 or more atoms of the same element combined | molecule of that element
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| 2 or more atoms of difference elements combined | molecule of a compound
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| substances made of two ore more components mixed physically | mixture
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| homogeneous mixtures of compounds that may be liquids, gases, or solids | solution
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| greatest amounts | solvents
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| smaller amounts | solutes
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| may be described by its concentration expressed as % or in terms of molarity | solutions
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| heterogeneous mixtures | colloids or emulsions
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| heterogeneous mixtures with large (often) visible solutes that tend to settle out | suspensions
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| difference between mixtures and compounds | chemical bonding does not occur in mixtures
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| can be separated into chemical components by physical means | mixtures
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| separation is done by chemical means | compounds
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| an energy relationship between electrons of the reacting atoms | chemical bond
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