JKSSB Mock Tests

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
Answer: Option A
Solution (By JKSSB Mock Tests Team)
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.
This Question Belongs to: General science Chemistry set 1
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