📝 Multiple Choice Question
General-science
The Modern Periodic Table has 18 vertical columns known as 'groups' and horizontal rows known as 'periods'.
A
7
B
6
C
8
D
12
Explanation
The modern periodic table is elegantly structured into precisely 7 horizontal periods. These periods visually represent the seven principal quantum energy levels that encapsulate the electrons of all currently discovered and named elements.
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