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प्रश्न
What is the main characteristic of the last element in each period of the periodic table?
उत्तर
The last element in each period of the periodic table is a gaseous element with its valence shell completely filled. Except for helium, which has a complete duplet configuration, all five gases have a complete octet configuration.
संबंधित प्रश्न
Give two example of group 1 elements.
Which element has two shells, both of which are completely filled with electrons?
State how the valency of elements varies in a group of the periodic table?
Name the type of elements which have two outermost shell incomplete.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
The K and L shells of the elements Na and Mg contain electrons.
Write scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
Distinguish between:
s-block - p-block
Elements in the modern periodic table are arranged in ______groups and______ periods.
What are groups and periods in the modern periodic table?
