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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
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
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.
How many rows and columns are there in the modern periodic table?
What is meant by a group, in a periodic table?
Give two example of group 1 elements.
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
What is the number of elements in the 1st period?
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
State any five features of modern periodic table.
