for both the reactions.
The atomic number of an element A is 13. Write the electronic configuration of A and on the
basis of this configuration, determine the group number and period number of the element A. If
the element A reacts with another element B of electronic configuration 2. 8. 7 to form a
compound, write the formula of the compound formed
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the atomic number of an element A is 13.write the electronic configuration of A and on the basis of this configuration determine the group number and period number of the element A .If the element A reacts with another element B of electronic configuration 2,8.7 to form a compound ,write the formula of the compound formed.[3 marks]
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