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CHM 1020 Exam 1
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Exam of 6 pages for the course Biology 101 at Biology 101 (CHM 1020 Exam 1)
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CHM 1020 Exam 1matter - ANS-any solid, liquid, gas, or plasma that occupies a space and has mass
homogeneous mixture - ANS-mixture that is uniform throughout (solution)
heterogeneous mixture - ANS-mixture that is not uniform throughout
atoms - ANS-smallest unit of an element
element - ANS-many atoms of the same type; most basic building blocks
compounds - ANS-different elements bonded together (pure substance)
chemical symbols - ANS-one or two letter abbreviation for elements (atomic symbols)
group - ANS-vertical columns on periodic table; organized by common properties
Group 1 - ANS-alkali metals
Group 2 - ANS-alkaline earth metals
Group 17 - ANS-halogens
Group 18 - ANS-noble gases (least likely to react)
chemical formula - ANS-elementary composition of a substance; consists of elements
and atomic ratio (subscripts)
molecule - ANS-two or more atoms held together by chemical bonds
molecular compound - ANS-nonmetal and nonmetal
ionic compound - ANS-metal and nonmetal
chemical compound - ANS-elements in fixed proportions
nucleus - ANS-highly dense center of atom composed of protons and neutrons
, protons - ANS-positively charged
neutrons - ANS-neutral charge
electrons - ANS-found outside of the atom; negative charge
atomic number - ANS-number of protons in nucleus
molar mass - ANS-number under chemical symbol on periodic table
mass number - ANS-sum of protons and neutrons
conductivity - ANS-based on...
1. 3-D structure
2. mobility of electrons
3. electricity
electric current - ANS-net movement of electrons and ions
electricity - ANS-flow of electrons from one region to another that is driven by a
difference in potential energy
static electricity - ANS-electricity built up in one place
conductive - ANS-allows electricity to flow
insulating - ANS-prohibits electricity from flowing
allotropes - ANS-different structural forms of the same element
diatomic molecules - ANS-molecules with two identical atoms
rocks - ANS-heterogenous solid mixtures that contain a variety of ionic compounds
(minerals)
oxides - ANS-oxygen containing minerals
significant figures - ANS-represents accuracy of an experimental quantity known
ore - ANS-rock formation that contains a considerable concentration of a desired metal
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