ACS STUDY GUIDE EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED | 2026/2027 LATEST UPDATE |
GRADED A+
T or F? Non-zero numbers ARE significant - ANSWER True
T or F? Leading zeros ARE significant. - ANSWER False. Leading zeros are NOT significant
T or F? Zeros between non-zero numbers ARE significant - ANSWER True
T or F? Trailing zeros are NOT significant. - ANSWER False. Trailing zeros ARE significant
How many significant figures are in 0.050? - ANSWER 2
How many significant figures are in 1.0056 - ANSWER 5
How many significant figures are in 0.00068 - ANSWER 2
How many significant figures are in 135.0 - ANSWER 4
What is the formal charge of Cobalt (Co)? - ANSWER 2+ or 3+
What is the formal charge of Chromium (Cr)? - ANSWER 3+ or 3+
What is the formal charge of Copper (Cu)? - ANSWER 2+ or 1+
What is the formal charge of Iron (Fe)? - ANSWER 3+ or 2+
What is the formal charge of Manganese (Mg)? - ANSWER 2+ or 4+
What is the formal charge of Mercury (Hg)? - ANSWER 2+ or 1+
, What is the formal charge of Tin (Sn)? - ANSWER 4+ or 2+
What is the formal charge of Lead (Pb)? - ANSWER 2+ or 4+
What is the formal charge of Zinc (Zn)? - ANSWER 2+ ONLY
What kind of charge do Metals have? - ANSWER A positive charge (cation)
What kind of charge do Non-Metals have? - ANSWER A negative charge (anion)
When do you use a roman numeral when naming compounds? - ANSWER If the element has multiple
possible charges
What is the rule of "N - Energy Level"? - ANSWER Can be any integer from 1-∞
What is the rule of "l - Orbital Type"? - ANSWER S orbital - 0
P orbital - 1
D orbital - 2
F orbital - 3
Can be 0 up to N-1
What is the rule of "M(l) - Magnetic Quantum Number"? - ANSWER Can be -l to 0 to +l
What is the rule of "M(s) - Magnetic Spin Number"? - ANSWER Can be +1/2 or -1/2
What are the 6 strong acids - ANSWER Perchloric Acid - HClO4
Hydrochloric Acid - HCl
Hydrobromic Acid - HBr
Hydroiodic Acid - HI
COMPLETE SOLUTIONS VERIFIED | 2026/2027 LATEST UPDATE |
GRADED A+
T or F? Non-zero numbers ARE significant - ANSWER True
T or F? Leading zeros ARE significant. - ANSWER False. Leading zeros are NOT significant
T or F? Zeros between non-zero numbers ARE significant - ANSWER True
T or F? Trailing zeros are NOT significant. - ANSWER False. Trailing zeros ARE significant
How many significant figures are in 0.050? - ANSWER 2
How many significant figures are in 1.0056 - ANSWER 5
How many significant figures are in 0.00068 - ANSWER 2
How many significant figures are in 135.0 - ANSWER 4
What is the formal charge of Cobalt (Co)? - ANSWER 2+ or 3+
What is the formal charge of Chromium (Cr)? - ANSWER 3+ or 3+
What is the formal charge of Copper (Cu)? - ANSWER 2+ or 1+
What is the formal charge of Iron (Fe)? - ANSWER 3+ or 2+
What is the formal charge of Manganese (Mg)? - ANSWER 2+ or 4+
What is the formal charge of Mercury (Hg)? - ANSWER 2+ or 1+
, What is the formal charge of Tin (Sn)? - ANSWER 4+ or 2+
What is the formal charge of Lead (Pb)? - ANSWER 2+ or 4+
What is the formal charge of Zinc (Zn)? - ANSWER 2+ ONLY
What kind of charge do Metals have? - ANSWER A positive charge (cation)
What kind of charge do Non-Metals have? - ANSWER A negative charge (anion)
When do you use a roman numeral when naming compounds? - ANSWER If the element has multiple
possible charges
What is the rule of "N - Energy Level"? - ANSWER Can be any integer from 1-∞
What is the rule of "l - Orbital Type"? - ANSWER S orbital - 0
P orbital - 1
D orbital - 2
F orbital - 3
Can be 0 up to N-1
What is the rule of "M(l) - Magnetic Quantum Number"? - ANSWER Can be -l to 0 to +l
What is the rule of "M(s) - Magnetic Spin Number"? - ANSWER Can be +1/2 or -1/2
What are the 6 strong acids - ANSWER Perchloric Acid - HClO4
Hydrochloric Acid - HCl
Hydrobromic Acid - HBr
Hydroiodic Acid - HI
