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प्रश्न
Name and state the following with reference to the elements of the first three periods of the periodic table.
Alkaline earth metal in period 3.
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उत्तर
Magnesium
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संबंधित प्रश्न
Write the electronic configuration of K and Ne.
How does the number of valence electrons vary on moving from left or right in the second period of the periodic table?
Fill in the blank in the following statement:
The tendency to gain an electron ............... on moving down in a group of the periodic table.
How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?
Explain why, the properties of elements are repeated after 2, 8, 18 and 32 elements in the periodic table.
In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group ?
How many groups and periods are there in the modern periodic table?
With reference to the variation of properties in the Periodic table, which of the following is generally true?
The position of elements A, B, C, D and E in the periodic table are shown below:
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Group 1 |
Group 2 |
Group 17 |
Group 18 |
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|
|
|
D |
|
|
B |
C |
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|
A |
|
|
E |
Which is larger in size (i) D or E (ii) B or C
Moving left to right in the second period, the number of valence electrons _____.
