WGU- INTRO TO CHEMISTRY QUESTIONS WITH
ANSWERS
Protons - CORRECT ANSWERS ✔✔positive charge
The atomic number of an element is the total number of which
particles in the nucleus? - CORRECT ANSWERS ✔✔protons
Electron - CORRECT ANSWERS ✔✔A subatomic particle that has a
negative charge
significant figures - CORRECT ANSWERS ✔✔a prescribed decimal
place that determines the amount of rounding off to be done based
on the precision of the measurement
mass number - CORRECT ANSWERS ✔✔the sum of the number of
neutrons and protons in an atomic nucleus
amu - CORRECT ANSWERS ✔✔atomic mass unit
average atomic mass formula - CORRECT ANSWERS ✔✔(mass)(%)
+(mass)(%)/100 ( % in decimal)
,atomic radius - CORRECT ANSWERS ✔✔the distance from the
center of an atom's nucleus to its outermost electron
Energy level 1 holds how many electrons? - CORRECT ANSWERS
✔✔up to 2 electrons
Energy level 2 holds how many electrons? - CORRECT ANSWERS
✔✔up to 8 electrons
Energy level 3 holds how many electrons? - CORRECT ANSWERS
✔✔up to 18 electrons
Lewis Dot Structure - CORRECT ANSWERS ✔✔diagram of a
molecule using dots to represent valence electrons
polyatomic ions - CORRECT ANSWERS ✔✔groups of atoms with an
overall charge
funtional groups - CORRECT ANSWERS ✔✔the components of
organic molecules that are most commonly involved in chemical
reactions
, Alkane - CORRECT ANSWERS ✔✔a hydrocarbon containing only
single covalent bonds
Alkyne - CORRECT ANSWERS ✔✔carbon-carbon triple bond
Alkene - CORRECT ANSWERS ✔✔double bond, carbon to carbon.
Avogadro's number - CORRECT ANSWERS ✔✔6.02 x 10^23, the
number of atoms or molecules in 1 mol
molar mass - CORRECT ANSWERS ✔✔the mass of one mole of a
pure substance 1:1 ratio with atomic mass, in g/mol
PV=nRT - CORRECT ANSWERS ✔✔ideal gas law equation
molar volume - CORRECT ANSWERS ✔✔the volume occupied by 1
mole of a gas at standard temperature and pressure (STP); 22.4 L
any gas at STP has the volume of... - CORRECT ANSWERS ✔✔22.4L
ANSWERS
Protons - CORRECT ANSWERS ✔✔positive charge
The atomic number of an element is the total number of which
particles in the nucleus? - CORRECT ANSWERS ✔✔protons
Electron - CORRECT ANSWERS ✔✔A subatomic particle that has a
negative charge
significant figures - CORRECT ANSWERS ✔✔a prescribed decimal
place that determines the amount of rounding off to be done based
on the precision of the measurement
mass number - CORRECT ANSWERS ✔✔the sum of the number of
neutrons and protons in an atomic nucleus
amu - CORRECT ANSWERS ✔✔atomic mass unit
average atomic mass formula - CORRECT ANSWERS ✔✔(mass)(%)
+(mass)(%)/100 ( % in decimal)
,atomic radius - CORRECT ANSWERS ✔✔the distance from the
center of an atom's nucleus to its outermost electron
Energy level 1 holds how many electrons? - CORRECT ANSWERS
✔✔up to 2 electrons
Energy level 2 holds how many electrons? - CORRECT ANSWERS
✔✔up to 8 electrons
Energy level 3 holds how many electrons? - CORRECT ANSWERS
✔✔up to 18 electrons
Lewis Dot Structure - CORRECT ANSWERS ✔✔diagram of a
molecule using dots to represent valence electrons
polyatomic ions - CORRECT ANSWERS ✔✔groups of atoms with an
overall charge
funtional groups - CORRECT ANSWERS ✔✔the components of
organic molecules that are most commonly involved in chemical
reactions
, Alkane - CORRECT ANSWERS ✔✔a hydrocarbon containing only
single covalent bonds
Alkyne - CORRECT ANSWERS ✔✔carbon-carbon triple bond
Alkene - CORRECT ANSWERS ✔✔double bond, carbon to carbon.
Avogadro's number - CORRECT ANSWERS ✔✔6.02 x 10^23, the
number of atoms or molecules in 1 mol
molar mass - CORRECT ANSWERS ✔✔the mass of one mole of a
pure substance 1:1 ratio with atomic mass, in g/mol
PV=nRT - CORRECT ANSWERS ✔✔ideal gas law equation
molar volume - CORRECT ANSWERS ✔✔the volume occupied by 1
mole of a gas at standard temperature and pressure (STP); 22.4 L
any gas at STP has the volume of... - CORRECT ANSWERS ✔✔22.4L
