Chemistry Final ACS Exam Questions and
Correct Answers with Verified Solutions
New Update 2026
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
Correct Answers with Verified Solutions
New Update 2026
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
