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Question
‘The periodic table contains elements methodically grouped together’.
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Solution
The periodic table contains elements methodically grouped together like [I-A] alkali group [II-A] alkali earth group, halogens [17 OR 7-B] group, normal elements. Transition elements, noble gases [O-group], etc. If we know the properties of one member of a family, we know the properties of other members of the same family will be similar.
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Give reason:
Alkali metals and halogens do not occur free in nature.
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Inert gases do not form compounds.
Write a short note on the following type of element –
halogens
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.
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Noble gases do not form compounds readily.
State the following:
The group whose elements are unreactive or inert.
