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प्रश्न
Write a short note on the following type of element –
noble gases
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उत्तर
Element of 18th or O group (He, Ne, Ar, Kr, Xe, Rn) is called noble gases as they are inert gases and have valency 0. All are mono-atomic.
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संबंधित प्रश्न
What are the following group known as?
Group 1
Name and state the following with reference to the elements of the first three periods of the periodic table.
Group whose elements have zero valencies.
Name the method by which alkali metals can be extracted.
Name the first three alkaline earth metals.
Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.
Write the electronic configuration of the first two alkaline earth metals.
Name the gas used in:
Filling balloons
Name the gas used in:
Light bulbs
Name or state following with reference to the element of the first three periods of the periodic table.
An alkaline earth metal in period 3.
Give a reason for the following:
Group 1 [I – A] elements are called alkali metals.
