What are magic numbers ?...

What are magic numbers ?

Text Solution

Verified by Experts

The numbers 2, 8, 8, 18, 18, 32 are known as magic numbers. It is because of the fact that the elements which occur after these intervals have similar properties. For example, atomic number of Li is 3. If we add 8 (magic number) to 3, then we will get atomic number 11 which stands for sodium. We will find that Li and Na are in the same group and have similar properties.

Doubtnut Promotions Banner Desktop Dark

Doubtnut Promotions Banner Mobile Dark

|

Topper's Solved these Questions

CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
OMEGA PUBLICATION|Exercise Multiple Choice Questions (MCQs) |29 Videos
CHEMICAL BONDING AND MOLECULAR STRUCTURE
OMEGA PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS |27 Videos
ENVIRONMENTAL CHEMISTRY
OMEGA PUBLICATION|Exercise Multiple Choice Question (MCQs)|23 Videos

Similar Questions

Explore conceptually related problems

A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers ?

A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers ?

A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers ?

Sum of two numbers is 74.One of the number is 10 more than the other.What are the numbers ?

Two numbers are in ratio 5 : 3. If they differ by 18, what are the numbers ?

Two numbers are in the ratio 5:3. If they differ by 18, what are the numbers ?

Two numbers are in the ratio 5:3. If they differ by 18, what are the numbers ?

A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new umbers becomes twice the other new number. What are the numbers?

Two numbers are in the ratio 5:3. If they differ by 18, what are the numbers?

What are the number of protons and the number of neutrons in a nucleus of U^(238)_92 ?

OMEGA PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-Multiple Choice Questions (MCQs)

What are magic numbers ?
01:24
|
Mendeleev's periodic law is based on
02:36
|
In the modern periodic table elements are arranged in order of
01:56
|
The modern periodic table known as the long form of periodic table was...
03:17
|
The long form of periodic table has
02:51
|
Fill in the blanks: The elements of group 17 are called…........
02:04
|
Alkaline earth metals belong to
01:05
|
Which of the following represents the electronic configuration of d-bl...
01:35
|
Explain why transition elements have high melting and boiling points ?
03:13
|
Which among the following will have largest size ?
01:05
|
Which of the following is/are correct?
03:54
|
The energy required to remove an electron from a gaseous atom from its...
03:27
|
In a period from Li to F ionisation enthalpy
04:59
|
Given the correct order of electronegativity of central atom in follow...
04:09
|
The electronegativities of F and H are 4.0 and 2.1 respectively. The p...
01:54
|
Which of the following element has maximum electron gain enthapy(neg...
02:10
|
The main source of energy is ….. .
01:27
|
The 3rd period of the periodic table contains
04:57
|
Which of the elements show least values of ionisation energies within ...
05:18
|
r("van der Waal") is
03:42
|
Which of the following does not have any unit?
01:59
|