The Modern Periodic Table has how many vertical columns called groups?
A14
B18
C16
D20
Answer & Solution
Correct answer: B. 18
1. Groups run down the table.
2. Their number is fixed in the modern table.
3. There are 18 groups.
_Source: syllabus Science Class X, Chapter 5, Periodic Classification of Elements._
Keep practising Periodic Classification of Elements
Browse all Periodic Classification of Elements questions for Gujarat Board Class 10 (GSEB), or explore more Chemistry topics.