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प्रश्न
What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?
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उत्तर
The elements at the end of the period have 8 electrons in the valence shell.
Ne = 2, 8
Ar = 2, 8, 8
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.
Write any one difference in the electronic configurations of group-1 and group-2 elements ?
How do atomic structures (electron arrangements) change in a period with increase in atomic numbers from left to right?
What is its atomic number?
Fill in the blank
There are ______ groups and ______ periods in the modern form of periodic table.
'In a group, the atomic radii increase with increasing period number', explain this statement and justify it with reference to group 17.
The following questions refer to the Periodic Table.
What is the common feature of the electronic configurations of the elements in group 7?
Choose the correct answer from the choice given:
An element A belonging to Period 3 and Group II will have
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 |
State which is metals, non-metals, and noble gas in this table.
State the property trends in general of elements on moving down in a group of the periodic table.
