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प्रश्न
Name the gas used in:
Filling balloons
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उत्तर
Helium
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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?
What are the following group known as?
Group 18
Name and state the following with reference to the elements of the first three periods of the periodic table.
Noble gas having electronic configuration: 2, 8, 8.
Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.
How many electrons do inert gases have in their valence shells?
Name the gas used in:
Bright colour advertising light works
Give reason:
Alkali metals and halogens do not occur free in nature.
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.
