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प्रश्न
Name the gas used in:
Filling balloons
उत्तर
Helium
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संबंधित प्रश्न
Arrange the Elements of Group 17 and Group 1 According to the Given Conditions.
Increasing order of atomic size,
Consider the following elements: Be, Li, Na, Ca, K. Name the elements of (a) same group (b) same period.
How do atomic structures (electron arrangements) change in a period with an increase in atomic numbers moving left to right?
Take any one alkali metal and write its reaction with (i)oxygen (ii)water (iii)acid.
Name the first three alkaline earth metals.
How many electrons do inert gases have in their valence shells?
Comment on the (i) reactivity (ii) colour (iii) physical state of group 17 elements.
Give a reason for the following:
Noble gases do not form compounds readily.
State the following:
The group from the groups 1 [IA], 2 [IIA], 16 [VIA] and 7 [VIIA] whose elements are most electronegative.
State the following:
The group whose elements are unreactive or inert.
