Chemistry Final ACS Exam Questions
with Quality Answers 2026 Updated.
Accuracy? - Answer Closeness of measurements to the TRUE VALUE of what is being
measured
Precision? - Answer Closeness of a SET of measurements
How do you calculate Percent Error? - Answer I experimental-accepted I
____________________ x 100
accepted value
Are zeros infront of non-zero digis significant? - Answer Nope!
ex: 0.0071 is only 2 sig figs
Are zeros at the end of a number and to the right of the decimal significant? - Answer Yep!
ex: 9.100 is 4 sig figs
Addition/Subtraction in regards to sig figs? - Answer Round numbers to the least number of
decimal places
Multiplaction/Division in regards to sig figs? - Answer Round answers to the least amount of
sig figs
# of e- equal - Answer the # of p+
Atomic Mass? - Answer Number of protons in the nucleus (number on the left bottom corner
of the chemical symbol)
Atomic Mass Number? - Answer Number of protons and neutrons (number on the left upper
corner of the chemical symbol)
Isotope? - Answer Atoms of the same element, but with different masses (different number
of neutrons)
STUDY ELECTRON CONFIGURATIONS - Answer STUDY ELECTRON CONFIGURATIONS
, Do columns or rows in the Periodic Table have similar patterns? - Answer Columns (the
"groups") have repeating patterns?
Which area of the Periodic Table has greater metallicness? - Answer Left and down has
greater metallicness
Which area of the PT has greater atomic size? - Answer Left and down has a greater atomic
size
Which area of the PT has greater ionization energy? - Answer Right side and up has greater
ionization energy
Which area of the PT has greater electronegativity? - Answer Right side and up has greater
electronegativiy, except the Noble Gases of 0 electronegativy
Ionic Bonding? - Answer Metal and a nonmetal. Give/take electrons
Covalent bonding? - Answer Nonmetal and a nonmetal. Share electrons.
VSEPR Theory? - Answer Valence Shell Electron Pair Repulsion
aka Valence e- pairs stay as far apart as possible
How do you determine polarity? - Answer Use the chart that has electronegativity values,
then subtract the elements in the compound from each other.
Is water polar? - Answer Yes!
Combination Reaction? - Answer A + B --> AB
Decomposition Reaction? - Answer AB --> A + B
Single Replacement Reaction? - Answer AB + C --> AC + B
Double Replacement Reaction? - Answer AB + CD --> AD + CB
Combustion Reaction? - Answer C + H + O --> H2O + CO2 always
with Quality Answers 2026 Updated.
Accuracy? - Answer Closeness of measurements to the TRUE VALUE of what is being
measured
Precision? - Answer Closeness of a SET of measurements
How do you calculate Percent Error? - Answer I experimental-accepted I
____________________ x 100
accepted value
Are zeros infront of non-zero digis significant? - Answer Nope!
ex: 0.0071 is only 2 sig figs
Are zeros at the end of a number and to the right of the decimal significant? - Answer Yep!
ex: 9.100 is 4 sig figs
Addition/Subtraction in regards to sig figs? - Answer Round numbers to the least number of
decimal places
Multiplaction/Division in regards to sig figs? - Answer Round answers to the least amount of
sig figs
# of e- equal - Answer the # of p+
Atomic Mass? - Answer Number of protons in the nucleus (number on the left bottom corner
of the chemical symbol)
Atomic Mass Number? - Answer Number of protons and neutrons (number on the left upper
corner of the chemical symbol)
Isotope? - Answer Atoms of the same element, but with different masses (different number
of neutrons)
STUDY ELECTRON CONFIGURATIONS - Answer STUDY ELECTRON CONFIGURATIONS
, Do columns or rows in the Periodic Table have similar patterns? - Answer Columns (the
"groups") have repeating patterns?
Which area of the Periodic Table has greater metallicness? - Answer Left and down has
greater metallicness
Which area of the PT has greater atomic size? - Answer Left and down has a greater atomic
size
Which area of the PT has greater ionization energy? - Answer Right side and up has greater
ionization energy
Which area of the PT has greater electronegativity? - Answer Right side and up has greater
electronegativiy, except the Noble Gases of 0 electronegativy
Ionic Bonding? - Answer Metal and a nonmetal. Give/take electrons
Covalent bonding? - Answer Nonmetal and a nonmetal. Share electrons.
VSEPR Theory? - Answer Valence Shell Electron Pair Repulsion
aka Valence e- pairs stay as far apart as possible
How do you determine polarity? - Answer Use the chart that has electronegativity values,
then subtract the elements in the compound from each other.
Is water polar? - Answer Yes!
Combination Reaction? - Answer A + B --> AB
Decomposition Reaction? - Answer AB --> A + B
Single Replacement Reaction? - Answer AB + C --> AC + B
Double Replacement Reaction? - Answer AB + CD --> AD + CB
Combustion Reaction? - Answer C + H + O --> H2O + CO2 always
