Modern Chemistry - a few random cards
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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| Mass | the measure of the amount of matter
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| volume | the amount of 3D space an object occupies
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| atom | the smallest unit of an element that maintains the chemical identity of that element.
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| element | pure substance that cannot be broken down into simpler, stable substances. Made of one atom.
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| extensive properties | depend on the amount of matter present. volume, mass, amount of energy in a substance
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| intensive properties | do not depend on the amount of matter present. melting point, boiling point, density, and ability to conduct electricity and transfer heat.
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| alloy | a substance composed of two or more metals (or metals & a nonmetal)
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| molecule | the smallest unit of an element or compound that retains all of the properties of that element or compound
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| colloid | a mixture consisting of tiny particles that are intermediate in size between those in solutions & those in suspensions and that are suspended in a liquid, solid, or gas
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| suspension | a mixture in which particles of a material are more or less evenly dispersed throughout a liquid or gas.
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| ductility | the ability of a substance to be hammered thin or drawn out into a wire
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| group | vertical column
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| malleability | the ability of a substance to be hammered or beaten into a sheet.
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| period | horizontal row. elements in a period tend to be the most similar to each other
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| tensile strength | a measure of the ability of material to resist a force that tends to pull it apart.
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| scientific method | a logical approach to solving problems by observing and collecting data, formulating hypotheses, testing hypotheses and formulating theories that are supported by data.
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| system | a specific portion of matter in a given region of space that has been selected for study during an experiment or observation.
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| quantitative | numerical data
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| qualitative | descriptive data when observing
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| quantity | something that has size, magnitude, or amount.
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| SI | the meter, kilogram, second, kelvin (temp.), mole (amount of substance), ampere (electric current), and candela (luminous intensity)
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| weight | the measure of gravitational pull on an object
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| derived unit | combination of SI base units
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| conversion factor | a ration derived from the equality between two different units that can be used to convert from one unit to the other.
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| dimensional analysis | a mathematical technique that allows you to use units to solve problems involving measurements.
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| Density equation | D = M / V
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| Percentage error equation | experimental value - accepted value divided by accepted value, times 100
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| accuracy | closeness to actual measurement
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| precision | closeness to your other measurements
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| significant figures rules | - zeros between nonzero digits are significant (5008)
- zeros at the end of a number & to the right of a decimal place are significant (9000 or .09)
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| directly proportional | if you can divide one by the other & get a constant value (straight line)
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| inversely proportional | their product is constant. hyperbola.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Emilyy28
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