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प्रश्न
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of elements in group 1 [I–A].
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उत्तर
Valency of elements in group [I–A] is +1
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संबंधित प्रश्न
The electrons in the atoms of four elements A, B, C and D are distributed in three shells having 1, 3, 5 and 7 electrons in the outermost shell respectively. State the period in which these elements can be placed in the modern periodic table. Write the electronic configuration of the atoms of A and D and the molecular formula of the compound formed when A and D combine.
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is ______.
Fill in the blank in the following statement:
On moving form right to left in the second period, the number of valency electrons ...............
What do you understand by periodicity?
How does the number of:
valency vary on moving from left to right in the second period of the periodic table?
An element X belong to 3rd periods and group II of the periodic table state:
the number of valence electrons,
What is modern periodic law?
Arrange the following as per instruction given in the bracket
Na, K, Cl, S, Si (increasing ionisation potential)
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
|
A |
|
|
E |
Which type of ion will be formed by elements A, B, and C.
Give a reason for the following:
A transition from metallic to non-metallic elements is seen on moving from left to right in a period of the periodic table.
