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CHE-125 Ch. 1

QuestionAnswer
Matter anything that has mass and occupies space
Scientific Method the systematic process of observation, hypothesis, and expierimentation used to expand and refine a body of knowledge.
Solid a substance with definte shape and volume
Liquid substance with definte volume but indefinte shape(assumes shape of its container)
Gas substance with niether definte volume or shape
States of Matter the physical state of a substance (solid/liquid/gas)
Change of State conversion of a substance from one state to another
Pure Substance uniform chemical composition throughout
Mixture a blend of two or more substances, each of which retains its chemcial idenity.
Element fundamental substance which that connot be broken down chemically into any simpler substance
Chemical Compound a pure substance that can be broken down into simpler substances by chemical reactiosn
Reactants A starting substance that undergoes a change during a chemical reaction
Product the substance formed as a reslt of a chemical reaction
Chemical Reaction A process in which the idenity and compisition of one or more substances are changed
Chemcial Formula A notation for a chemical compound using element symbols and subscripts to show how many atoms of each element are present
Metal A malleable element with a lustrous appearence that is a good conductor of heat and electricity. Solid @ room temp., Ductile.
The only metallic element that is liquid at room temp is? Mercury (Hg)
How many elements are on the periodic table? 117
Amount of elements that occur naturally? 90
Exanmples of Physical Change? Phase changes, dissolving sugar in water, breaing glass, nickel sticking to magnet.
Examples of Chemical Change? Milk Souring, Rusting, burning, exploding of nitroglycerin, ignition of matches.
Examples of Mixtures? Seawater, Mayonnaise, Rocks, Blood, Toothpaste, fog
Examples of Compounds? Water, Sugar, Sodium Chloride, Gaseous Ammonia, steam+water, Sodium Bicarbonate (Baking Soda)
Non-metals Many are exotic colored. Bad conducters. 11 are gases @ room temp, 5 are brittle solids, and Bromine is the only liquid nonmetal.
Metalloids Located along staircase (except Alumminum Al & Polonium Po). Solids, Dull, semi conductors.
Created by: kaelin.steele
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