August 2019 NY Regents Chemistry Exam
8 Strontium and barium have similar chemical properties because atoms of these elements have the same number of
(1) protons
(2) neutrons (3) electron shells
(4) valence electrons
Solution: Atoms with the same number of valence electrons have similar chemical properties.
Answer: 4
Prepare for the Chemistry Regents Exam: HERE
Contact us for chemistry tutoring: HERE