Paper 2 · November 2016 · Atomic Structure and Bonding
An element X has the electron configuration 2, 8, 3. In which period of the periodic table is X located?
AGroup 3
BPeriod 3
CPeriod 2
DPeriod 4
Explanation
X has three electron shells (2,8,3), so it belongs to Period 3; the number of shells equals the period number.
Derived from ZIMSEC Chemistry 5071/2 Paper 2 Theory, November 2016, Q1