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The group number is found by the number of valence electrons. The period number is found by the number of energy levels. These 2 controls the position of an element.

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Number of valence electron determines its position. Number of shells help in locating its position.

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Atomic number controls its position in Periodic Table. It is grouped with the elements having same properties.

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Q: What controls an element position on the periodic table?
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How is the position on the periodic table related to the chemical properties of an element?

Position of Periodic Table describes chemical properties. it is estimated from its position in table.


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Periodic table can be used to sketch an element. Its configuration can be assumed from its position.


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colour of the elemrnt


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