January 2020 NY Regents Chemistry Exam
31 Given the table representing the subatomic particles in four different atoms:
Which atom has a mass of 12 u?
(1) A (2) E
(3) G
(4) J
Solution: Mass of an atom is equal to the sum of protons and neutrons.
Answer: 2
Prepare for the Chemistry Regents Exam: HERE
Contact us for chemistry tutoring: HERE