If you are looking for NCERT Science Class 10 Chapter 5 Activity solutions, then you are in the right place. In this post, you will find NCERT Activity 5.3 Class 10 Science Explanation with conclusion.
NCERT Activity 5.3 Class 10 Science Explanation with conclusion
You are
suggested to study NCERT activity 5.3 class 10 science explanation with
conclusion so that you can attempt questions based on the activity 5.3 class 10
science.
Class 10 Science Chapter 5 Periodic Classification of Elements
Activity 5.3 Class 10 Science
· How were the positions of cobalt and nickel resolved in the Modern Periodic Table?
· How were the positions of isotopes of various elements decided in the Modern Periodic Table?\
· Is it possible to have an element with atomic number 1.5 placed between hydrogen and helium?
· Where do you think should hydrogen be placed in the Modern Periodic Table?
Discussion:
The atomic number of cobalt (Co) is 27 and that of Nickel (Ni) is 28. In the modern
periodic table, elements are placed in increasing order of their atomic
numbers. So, cobalt (group 9) is placed before nickel (group 10) and
hence, their positions are accordingly to their atomic numbers in the Modern
Periodic Table.
In the modern periodic table, elements are
arranged in increasing order of their atomic numbers. Because isotopes of an element have the same atomic number,
therefore, they are placed at the same position in the modern periodic table.
As the atomic numbers of elements are
always in the whole number, therefore atomic numbers like 1.5 is not possible.
As hydrogen has the lowest atomic number
and also has the lowest atomic mass, therefore it should be placed in group 1
and period 1.
Conclusion- In the Modern Periodic table, elements are arranged
in increasing order of atomic numbers, so in the given activity all the queries
can be solved on the basis of atomic numbers.
Related Topics for You
1. Activity 5.4 Class 10 Science
2. Activity 5.2 Class 10 Science
3. NCERT Solutions of Class 10 Science Chapter 5
5. Solutions of Class 10 Science all chapters
5. Extra Questions of Chapter 5
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