📝 Multiple Choice Question
General-science
Identify an element that does NOT belong to period 4.
A
Zinc
B
Potassium
C
Calcium
D
Lithium
Explanation
Period 4 of the periodic table includes prominent elements ranging from Potassium (K) through Krypton (Kr), characterized by the active filling of the fourth principal energy shell. Lithium (Li) does not belong because it is a much lighter alkali metal firmly located in Period 2.
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