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प्रश्न
How many electrons do inert gases have in their valence shells?
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उत्तर
All the noble or inert gases have 8 electrons in their valence shell except helium which has two electrons in its valence shell.
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संबंधित प्रश्न
Consider the following elements: Be, Li, Na, Ca, K. Name the elements of (a) same group (b) same period.
What is meant in the periodic table by a group?
Name two elements of each group.
How do atomic structures (electron arrangements) change in a period with an increase in atomic numbers moving left to right?
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.
Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.
Give reason:
Alkali and alkaline earth metal compounds usually form electrovalent compounds.
Write a short note on the following type of element –
alkaline earth metals
State the main helpful features of the long form of the periodic table.
Select the correct answer from the options given below.
The most reactive halogen from group 17.
