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42 Cards in this Set
- Front
- Back
What type of measurement is numerical measurement? |
quantitative measurement
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What type of measurement is descriptive measurement?
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qualitative measurement
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Written as a product of a number between 1.00 and 9.99 and 10 raised to some power?
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scientific notation
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A reflection of how near the actual measurement the taken measure is?
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Accuracy
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A reflection of how close multiple measurements are to one another?
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Precision
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A unit in chemistry is called?
It is often used to discuss the quantity of a substance |
Mole
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The mass in grams of a substance?
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Molar mass
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Anything that takes up space and has mass?
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matter
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T/F mass is NOT the same as weight?
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True
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Quantity of matter an object has?
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Mass
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Substances that cannot be broken into simpler types of matter are called?
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elements
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The smallest part of an element that still retains all the original properties of an element?
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atom
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Central core of atom?
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nucleus
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Number of protons in the nucleus of an atom?
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atomic number
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T/F in most atoms there are an equal number of protons and electrons so the overall charge is 0?
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True
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Electrons orbit the nucleus in?
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energy levels
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When atoms of one element are combined with atoms of another element ____ are formed?
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molecules
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elements combine with other elements to form?
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compounds
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To combine, atoms undergo _______ to come to a stable state
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chemical reactions
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A bond where two or more atoms share one or more pairs of electrons?
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Covalent bond
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A bond where an electron from one atom is transferred to an atom of another element?
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Ionic bond
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An atom with an electrical charge?
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ion
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An attraction between the positive and negative ion is the ______?
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Ionic bond
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Energy that can be used for work w/i a system?
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free energy
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A chemical bond that yields a net release of free energy?
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Exergonic reaction?
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A reaction that yields a net absorption of free energy?
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Endergonic reaction
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A chemical substance that decreases the amount of activation necessary for a chemical reaction?
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catalyst
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Chemical reactions that result in transference of electrons?
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reduction-oxidation reactions (redox reactions)
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Reaction that occurs when atom loses one or more electrons resulting in a positive charge?
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oxidation reaction
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Reaction that occurs when an atom gains one or more electrons, resulting in a negative charge?
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reduction reaction
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Why does hydrogen gas exist at H2, and never just H?
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It is unstable on its own
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Energy of motion?
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Kinetic energy
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Theory that states particles in all forms of matter are constantly in motion?
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Kinetic theory
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Result of billions of particles colliding with an object simultaneously?
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gas pressure
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An empty space with no particles and no pressure?
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vacuum
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Forms when the temperature of the gas lowers enough for condensation to occur?
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liquid
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A liquid changed into a gas?
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vaporization
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A liquid changed into a gas without boiling?
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evaporation
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forms when the temperature lowers even further?
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solid
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Particles that make up a structure are in an orderly, repeating, 3d pattern?
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crystal lattice
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Substances change from solid to liquid (through ___________) and then to gas (through ________)
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melting, vaporization
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Process when solid changes directly into gas w/o going through a liquid stage?
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sublimation
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