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29-12-2020
Chemistry

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name the group and period of an element having atomic number 21

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29-12-2020

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.

Explanation:

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29-12-2020

Scandium has an atomic value of 21 it is in group 3, period 4 of the periodic table

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