1.

Element ‘X’ is having atomic number 28, it gives two electrons to element ‘Y’. a Write down the electronic configuration of ‘X’ and its ion b. In which block ‘X’ belongs?c. Write down the characteristics of that block

Answer»

a.  X28 – 1s2 2s2 2p6 3s2 3p6 3d8 4s2 

X2+ – 1s2 2s2 2p6 3s2 3p6 3d8 

b. d block Compound 

c. 1. It exhibits variable oxidation states 

2. Forms colored compounds 

3. Last electron enters d subshell



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