Which of the following statement is true about periodic table?
* (1) Down the group valency increase
(2) Valency is same in the same group (3) Valency first increase down the group then decrease
(4) None of above
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4
Explanation:
Hunter-gatherers traveled from place to place in search of food. Once food resources at a place were exhausted, they needed to go to a new place. ... Some people travel because they enjoy travelling.
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Answer:
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Explanation:
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