How many vertical columns are there in the modern periodic table and what are they called?
How many vertical columns are there in the modern periodic table and what are they called?
Official answer
In the Modern Periodic Table, there are 18 vertical columns. These vertical columns are called groups.
Marking scheme
- 1.Stating the number of vertical columns as 18 (0.5 marks)
- 2.Identifying these vertical columns as 'groups' (0.5 marks)
Hint
Think about the vertical columns in the periodic table where elements with similar chemical properties (like the alkali metals sodium and potassium) are grouped together.
Quick oral answer
There are 18 vertical columns in the Modern Periodic Table, and they are called groups.
Common mistakes
- 1.Confusing vertical columns (groups) with horizontal rows (periods).
- 2.Writing 8 or 16 groups instead of 18.
Analysis and explanation
The Modern Periodic Table organizes elements in a grid. The vertical columns are known as groups (numbered 1 to 18), while the horizontal rows are known as periods (numbered 1 to 7). Elements in the same group share similar chemical properties because they have the same number of valence electrons. For example, Chapter 3 of the NCERT textbook mentions alkali metals like lithium, sodium, and potassium, which all belong to Group 1 and exhibit highly reactive metallic properties.
Interesting facts
Group 18 elements are known as noble or inert gases because they have completely filled outermost shells and rarely react with other elements.
Question details
Q1 of 40 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2013
- Section
- Section A
- Marks
- 1
- Type
- Very Short Answer
- Chapter
- Metals and Non-metals
- Topic
- Modern Periodic Table
- Bloom's level
- Remembering
- Syllabus topic
- Modern Periodic Table
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2013?
This question carries 1 mark in the CBSE Class 10 Science 2013 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Metals and Non-metals" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Modern Periodic Table" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2013 paper?
This is a Very Short Answer question from Section A in the CBSE Class 10 Science 2013 paper.