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Question
Name the type of elements which have outermost shell complete.
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Solution
Noble gases
RELATED QUESTIONS
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 were the positions of cobalt and nickel resolved in the modern periodic table?
(b) What is the number of elements is 3rd period, the modern periodic table?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
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(ii) Which two elements belong to the same period?
Give reasons for your choice.
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Periodic table
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Third Period.
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- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
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