June 2017 NY Regents Chemistry Exam
13 Compared to a potassium atom, a potassium ion has
(1) a smaller radius
(2) a larger radius
(3) fewer protons
(4) more protons
Solution: If we find potassium (K) on the Periodic Table, we will see a charge of +1. This means when potassium atom becomes an ion, it loses one electron. Losing an electron means the radius gets smaller.
Answer: 1
Prepare for the Chemistry Regents Exam: HERE
Contact us for Regents Chemistry Tutoring: HERE