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प्रश्न
What is the main characteristic of the last element in each period of the periodic table?
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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.
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संबंधित प्रश्न
The modern periodic table was prepared by ______.
Name the type of elements which have one electron short of octet.
Name the type of elements which have two electrons in the outermost orbit.
Fill in the blank:
The horizontal rows in the periodic table are called _____________.
State the modern periodic law.
Give the chemical formula of sodium sulphite
Give the chemical formula of ammonium sulphate
Find the odd one out and give its explanation.
Right or wrong sentence.
To the left of the zig-zag line in the periodic table are the metal elements.
State whether true or false. If false, correct the statement.
Lanthanides and actinides are kept at the bottom of the periodic table because they resemble each other but they do not resemble with any other group elements.
