Answer
A) 2-
B) 1+
C) 3+
D) 1+
Work Step by Step
PART A: Oxygen is located in Group 6A. Therefore, it needs to gain two electrons in order to achieve a noble gas electron configuration. Thus, it is expected to form a 2— charge.
PART B: Potassium is located in Group 1A. Therefore, it needs to lose one electron in order to achieve a noble gas electron configuration. Thus, it is expected to form a 1+ charge.
PART C: Aluminum is located in Group 3A. Therefore, it needs to lose three electrons in order to achieve a noble gas electron configuration. Thus, it is expected to form a 3+ charge.
PART D: Rubidium is located in Group 1A. Therefore, it needs to lose one electron in order to achieve a noble gas electron configuration. Thus, it is expected to form a 1+ charge.
