Home › ICSE Class 9 › chemistry › The Periodic Table › How many groups does the modern periodic table c…
How many groups does the modern periodic table contain?
A18
B8
C16
D7
Answer & Solution
Correct answer: A. 18
1. The modern table has 18 vertical columns.
2. Each column is called a group.
3. Old Mendeleev tables had only 8 groups.
4. So the modern count is 18.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 5 'The Periodic Table'_
Related questions
Which element does NOT exist in nature?In the modern periodic table, transition elements occupy:Diagonal relationship is shown between:Which family of elements is highly UNreactive?Which property determines the position of an element in the periodic table?Why are alkali metals stored under kerosene?Which is the lightest noble gas?Which property of an element shows the greatest periodic change?