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Chem 1025 Exam 1 – 235 Answered Questions A+ Rated
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Chem 1025 Exam 1 – 235 AnsweredQuestions A+ Rated
matters - -anything that occupies space and has mass
-energy - -the capacity to move an object or transfer heat
-mass - -a measure of the quantity of matter
-the interaction of mass and gravity creates - -weight
-chemistry is the study of - -matter and energy
-one way to classify matter is by its - -chemical composition
-pure substance - -matter that has the same chemical composition not
mater what its origin; cannot be separated into components by physical
means; not combined with any other substance; uncommon
-mixture - -opposite of pure substance; a combination of two or more
substances that can vary in composition
-the two types of pure substances are - -elements and compounds
-all matter consists of - -pure or mixture of substances
-elements - -a substance that cannot be broken into simpler substances
even by chemical reaction
-what are the building blocks of matter? - -elements
-how many elements are named and of that number how many are natural
substances? - -114 elements; 83 natural substances
-what is the periodic table used for? - -to classify elements; elements in
each column(called groups/families) share similar characteristics and
properties
-what are the two main groups elements are classified into? - -metals and
nonmetals.
metals: elements characterized by luster and the ability to conduct
electricity (shiny)
nonmetals: elements that have dull appearance and poor conductor or
electricity
, -element symbol - -a shorthand version of an elements name consisting of
one or two letters; 1st letter uppercase
-H - -hydrogen
-He - -helium
-Li - -lithium
-Be - -beryllium
-B - -boron
-C - -carbon
-N - -nitrogen
-O - -oxygen
-F - -fluorine
-Ne - -neon
-Na - -sodium
-Mg - -magnesium
-Al - -alluminum
-Si - -silicon
-P - -phosphorus
-S - -sulfur
-Cl - -chlorine
-Ar - -argon
-K - -potassium
-Ca - -calcium
-Sc - -scandium
, -Ti - -titanium
-V - -vanadium
-Cr - -chromium
-Mn - -manganese
-Fe - -iron
-Co - -cobalt
-Ni - -nickel
-Cu - -copper
-Zn - -zinc
-Ga - -gallium
-Ge - -germanium
-As - -arsenic
-Se - -selenium
-Br - -bromine
-Kr - -krypton
-Rb - -Rubidium
-Sr - -Strontium
-Zr - -Zirconium
-Mo - -Molybdenum
-Pd - -Palladium
-Ag - -Silver
-Sn - -Tin
-I - -Iodine
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