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Name the group and period of an element having atomic number 21​
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Name the group and period of an element having atomic number 21​

User Soumya Kanti
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Scandium has an atomic value of 21 it is in group 3, period 4 of the periodic table
User Jakob Cosoroaba
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Answer:

The element in question here is Scandium, with an atomic number of 21. It is situated in Group 3 and Period 4 of the Periodic Table.

Step-by-step explanation:

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User Rismo
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