CHEM 121 EXAMINATION 5 2026
COMPREHENSIVE TEST QUESTIONS AND
SOLUTIONS VERIFIED
◉ atomic mass. Answer: weighted average of the masses of the
isotopes of an element, gives the mass of one atom of the element
◉ alkali metals. Answer: group 1 on periodic table
◉ alkali earth. Answer: group 2 on periodic table
◉ halogens. Answer: group 17 on periodic table
◉ properties of metals. Answer: good conductors of heat and
electricity, malleable, ductile, often shiny, tend to lose electrons in
chemical change
◉ properties of non metals. Answer: poor conductors of heat and
electricity, not ductile, not malleable, gain electrons in chemical
change
◉ avagadros number. Answer: 6.022 x 10^23
, ◉ ionic bond. Answer: bond between a nonmetal and a metal
◉ covalent bond. Answer: bond between 2 or more nonmetals
◉ naming covalent compounds. Answer: first element is given its
element name, second suffix replaced by "ide", USE GREEK
PREFIXES
◉ naming ionic compounds. Answer: name the metal, if the metal
has an uncommon charge, indicate the charge with roman numerals,
change nonmetal suffix to "ide", if polyatomic ion just name them
◉ properties of ionic compounds. Answer: crystalline, hard, brittle,
high melt point, insulators as solid, but conductors in solution or
when melted
◉ percent composition. Answer: mass of element / total mass of
compound x 100
◉ ionic. Answer: which type of compound completely dissociates in
water to form electrolytes?
COMPREHENSIVE TEST QUESTIONS AND
SOLUTIONS VERIFIED
◉ atomic mass. Answer: weighted average of the masses of the
isotopes of an element, gives the mass of one atom of the element
◉ alkali metals. Answer: group 1 on periodic table
◉ alkali earth. Answer: group 2 on periodic table
◉ halogens. Answer: group 17 on periodic table
◉ properties of metals. Answer: good conductors of heat and
electricity, malleable, ductile, often shiny, tend to lose electrons in
chemical change
◉ properties of non metals. Answer: poor conductors of heat and
electricity, not ductile, not malleable, gain electrons in chemical
change
◉ avagadros number. Answer: 6.022 x 10^23
, ◉ ionic bond. Answer: bond between a nonmetal and a metal
◉ covalent bond. Answer: bond between 2 or more nonmetals
◉ naming covalent compounds. Answer: first element is given its
element name, second suffix replaced by "ide", USE GREEK
PREFIXES
◉ naming ionic compounds. Answer: name the metal, if the metal
has an uncommon charge, indicate the charge with roman numerals,
change nonmetal suffix to "ide", if polyatomic ion just name them
◉ properties of ionic compounds. Answer: crystalline, hard, brittle,
high melt point, insulators as solid, but conductors in solution or
when melted
◉ percent composition. Answer: mass of element / total mass of
compound x 100
◉ ionic. Answer: which type of compound completely dissociates in
water to form electrolytes?
