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प्रश्न
(b) What is the number of elements is 3rd period, the modern periodic table?
उत्तर
(b) The number of elements in 3rd period is 8 in the modern periodic table.
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संबंधित प्रश्न
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
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It has variable valency and is a member of the Oxygen family (group 16).
