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प्रश्न
An element A has 2 electrons in its fourth shell. State its electronic configuration.
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उत्तर
Its electronic configuration is 1s22s22p63s23p64s2.
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संबंधित प्रश्न
Write the names given to the vertical columns and horizontal rows in the Modern Periodic Table. How does the metallic character of elements vary on moving down a vertical column? How does the size of atomic radius vary on moving left to right in a horizontal row? Give reason in support of your answer in the above two cases.
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
What is the main characteristic of the last element in each period of the periodic table?
Give the symbol and valency of the following element and radical.
Sodium
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
Identify gas A in the following experiment.
Which of the following elements would lose an electron easily?
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
Match the atomic number with the following:
A rare gas.
Give reason for the following:
Inert gases do not form ion.
