CHEMISTRY FINAL ACS EXAM
QUESTIONS AND ANSWERS 100% PASS
Accuracy? - ANS Closeness of measurements to the TRUE VALUE of what is being measured
Precision? - ANS Closeness of a SET of measurements
How do you calculate Percent Error? - ANS I experimental-accepted I
____________________ x 100
accepted value
Are zeros infront of non-zero digis significant? - ANS 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? - ANS Yep!
ex: 9.100 is 4 sig figs
Addition/Subtraction in regards to sig figs? - ANS Round numbers to the least number of
decimal places
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Multiplaction/Division in regards to sig figs? - ANS Round answers to the least amount of sig
figs
# of e- equal - ANS the # of p+
Atomic Mass? - ANS Number of protons in the nucleus (number on the left bottom corner of
the chemical symbol)
Atomic Mass Number? - ANS Number of protons and neutrons (number on the left upper
corner of the chemical symbol)
Isotope? - ANS Atoms of the same element, but with different masses (different number of
neutrons)
STUDY ELECTRON CONFIGURATIONS - ANS STUDY ELECTRON CONFIGURATIONS
Do columns or rows in the Periodic Table have similar patterns? - ANS Columns (the "groups")
have repeating patterns?
Which area of the Periodic Table has greater metallicness? - ANS Left and down has greater
metallicness
Which area of the PT has greater atomic size? - ANS Left and down has a greater atomic size
Which area of the PT has greater ionization energy? - ANS Right side and up has greater
ionization energy
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS 100% PASS
Accuracy? - ANS Closeness of measurements to the TRUE VALUE of what is being measured
Precision? - ANS Closeness of a SET of measurements
How do you calculate Percent Error? - ANS I experimental-accepted I
____________________ x 100
accepted value
Are zeros infront of non-zero digis significant? - ANS 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? - ANS Yep!
ex: 9.100 is 4 sig figs
Addition/Subtraction in regards to sig figs? - ANS Round numbers to the least number of
decimal places
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Multiplaction/Division in regards to sig figs? - ANS Round answers to the least amount of sig
figs
# of e- equal - ANS the # of p+
Atomic Mass? - ANS Number of protons in the nucleus (number on the left bottom corner of
the chemical symbol)
Atomic Mass Number? - ANS Number of protons and neutrons (number on the left upper
corner of the chemical symbol)
Isotope? - ANS Atoms of the same element, but with different masses (different number of
neutrons)
STUDY ELECTRON CONFIGURATIONS - ANS STUDY ELECTRON CONFIGURATIONS
Do columns or rows in the Periodic Table have similar patterns? - ANS Columns (the "groups")
have repeating patterns?
Which area of the Periodic Table has greater metallicness? - ANS Left and down has greater
metallicness
Which area of the PT has greater atomic size? - ANS Left and down has a greater atomic size
Which area of the PT has greater ionization energy? - ANS Right side and up has greater
ionization energy
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
