CHEM 1020 Exam 1 Study Questions with Correct
Answers 2023
matter - CORRECT ANSWER-any solid, liquid, gas, or plasma that occupies a space
and has mass
homogeneous mixture - CORRECT ANSWER-mixture that is uniform throughout
(solution)
heterogeneous mixture - CORRECT ANSWER-mixture that is not uniform
throughout
atoms - CORRECT ANSWER-smallest unit of an element
element - CORRECT ANSWER-many atoms of the same type; most basic building
blocks
compounds - CORRECT ANSWER-different elements bonded together (pure
substance)
chemical symbols - CORRECT ANSWER-one or two letter abbreviation for elements
(atomic symbols)
group - CORRECT ANSWER-vertical columns on periodic table; organized by
common properties
Group 1 - CORRECT ANSWER-alkali metals
Group 2 - CORRECT ANSWER-alkaline earth metals
Group 17 - CORRECT ANSWER-halogens
Group 18 - CORRECT ANSWER-noble gases (least likely to react)
chemical formula - CORRECT ANSWER-elementary composition of a substance;
consists of elements and atomic ratio (subscripts)
molecule - CORRECT ANSWER-two or more atoms held together by chemical
bonds
molecular compound - CORRECT ANSWER-nonmetal and nonmetal
ionic compound - CORRECT ANSWER-metal and nonmetal
chemical compound - CORRECT ANSWER-elements in fixed proportions
nucleus - CORRECT ANSWER-highly dense center of atom composed of protons
and neutrons
, protons - CORRECT ANSWER-positively charged
neutrons - CORRECT ANSWER-neutral charge
electrons - CORRECT ANSWER-found outside of the atom; negative charge
atomic number - CORRECT ANSWER-number of protons in nucleus
molar mass - CORRECT ANSWER-number under chemical symbol on periodic table
mass number - CORRECT ANSWER-sum of protons and neutrons
conductivity - CORRECT ANSWER-based on...
1. 3-D structure
2. mobility of electrons
3. electricity
electric current - CORRECT ANSWER-net movement of electrons and ions
electricity - CORRECT ANSWER-flow of electrons from one region to another that is
driven by a difference in potential energy
static electricity - CORRECT ANSWER-electricity built up in one place
conductive - CORRECT ANSWER-allows electricity to flow
insulating - CORRECT ANSWER-prohibits electricity from flowing
allotropes - CORRECT ANSWER-different structural forms of the same element
diatomic molecules - CORRECT ANSWER-molecules with two identical atoms
rocks - CORRECT ANSWER-heterogenous solid mixtures that contain a variety of
ionic compounds (minerals)
oxides - CORRECT ANSWER-oxygen containing minerals
significant figures - CORRECT ANSWER-represents accuracy of an experimental
quantity known
ore - CORRECT ANSWER-rock formation that contains a considerable
concentration of a desired metal
oxidation - CORRECT ANSWER-process in which chemical species loses electrons
reduction - CORRECT ANSWER-process in which chemical series gains electrons
redox - CORRECT ANSWER-process in which chemical series gains and loses
electrons
Answers 2023
matter - CORRECT ANSWER-any solid, liquid, gas, or plasma that occupies a space
and has mass
homogeneous mixture - CORRECT ANSWER-mixture that is uniform throughout
(solution)
heterogeneous mixture - CORRECT ANSWER-mixture that is not uniform
throughout
atoms - CORRECT ANSWER-smallest unit of an element
element - CORRECT ANSWER-many atoms of the same type; most basic building
blocks
compounds - CORRECT ANSWER-different elements bonded together (pure
substance)
chemical symbols - CORRECT ANSWER-one or two letter abbreviation for elements
(atomic symbols)
group - CORRECT ANSWER-vertical columns on periodic table; organized by
common properties
Group 1 - CORRECT ANSWER-alkali metals
Group 2 - CORRECT ANSWER-alkaline earth metals
Group 17 - CORRECT ANSWER-halogens
Group 18 - CORRECT ANSWER-noble gases (least likely to react)
chemical formula - CORRECT ANSWER-elementary composition of a substance;
consists of elements and atomic ratio (subscripts)
molecule - CORRECT ANSWER-two or more atoms held together by chemical
bonds
molecular compound - CORRECT ANSWER-nonmetal and nonmetal
ionic compound - CORRECT ANSWER-metal and nonmetal
chemical compound - CORRECT ANSWER-elements in fixed proportions
nucleus - CORRECT ANSWER-highly dense center of atom composed of protons
and neutrons
, protons - CORRECT ANSWER-positively charged
neutrons - CORRECT ANSWER-neutral charge
electrons - CORRECT ANSWER-found outside of the atom; negative charge
atomic number - CORRECT ANSWER-number of protons in nucleus
molar mass - CORRECT ANSWER-number under chemical symbol on periodic table
mass number - CORRECT ANSWER-sum of protons and neutrons
conductivity - CORRECT ANSWER-based on...
1. 3-D structure
2. mobility of electrons
3. electricity
electric current - CORRECT ANSWER-net movement of electrons and ions
electricity - CORRECT ANSWER-flow of electrons from one region to another that is
driven by a difference in potential energy
static electricity - CORRECT ANSWER-electricity built up in one place
conductive - CORRECT ANSWER-allows electricity to flow
insulating - CORRECT ANSWER-prohibits electricity from flowing
allotropes - CORRECT ANSWER-different structural forms of the same element
diatomic molecules - CORRECT ANSWER-molecules with two identical atoms
rocks - CORRECT ANSWER-heterogenous solid mixtures that contain a variety of
ionic compounds (minerals)
oxides - CORRECT ANSWER-oxygen containing minerals
significant figures - CORRECT ANSWER-represents accuracy of an experimental
quantity known
ore - CORRECT ANSWER-rock formation that contains a considerable
concentration of a desired metal
oxidation - CORRECT ANSWER-process in which chemical species loses electrons
reduction - CORRECT ANSWER-process in which chemical series gains electrons
redox - CORRECT ANSWER-process in which chemical series gains and loses
electrons
