Chemistry
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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| chemistry | the science of matter
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| matter | any object that has mass and occupies space
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| theory | a well established hypothesis
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| scientific law | a statement of natural phenomenon where no exceptions are known under any given circumstances
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| amorphous solids | solid without shape or form
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| gas | indefinite volume and no fixed shape
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| attractive forces | hold the particles together and give matter its appearance of continuity; strongest in solids, giving them rigidity, weaker in liquid, and weakest in gases.
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| pure substance | a definite, fixed composition and is either an element or a compound
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| homogeneous mixture |
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| heterogeneous matter | consists of two or more physically distinct phases
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| phase | a homogeneous part of a system separated from other parts by a physical boundary
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| mixture | a combination of two or more pure substances and can be homo or heterogeneous
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| scientific notation | a way to write very large or small numbers (measurements) in a compact form
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| measurement | a quantitative observation
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| metric or international system | standard system of measurements for mass lengths, time and other physical quantities
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| meter | standard unit of length of metric system
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| element | fundamental substance that cannot be broken down by chemical means into simpler substance; building blocks of matter
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| atom | smallest unit of an element that retains its properties and chemical behavior; made of subatomic particles
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| Dimitri Mendeleev | developed the periodic table in 1869
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| metals | solids at room temperature (except mercury); shiny, good conductors of heat and electricity; malleable (can be shaped); ductile; have a high melting point and density
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| nonmetals | not shiny; have fairly low melting points and densities; poor conductors of heat and electricity; can combine with each other to form molecullar compounds
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| metalloids | have properties between metals and nonmetals
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| compound | a substance containing two or more elements that are chemically combined in a definite proportion; decompose chemically into simpler
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Created by:
danat214
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