TG EAMCET 3 May 2025 Shift 1 Paper

Step 1: Write the electron configuration of Strontium ( Sr,Z=38 )

Sr(Z=38)=1s22s22p63s23p64s23d104p65s2
Step 2: Count electrons with l=0
Electrons with l=0 are in s orbitals. Add up all the electrons in s orbitals: x=2(1s)+2(2s)+2(3s)+2(4s)+2(5s)=10 So, x=10
Step 3: Count electrons with l=2
Electrons with l=2 are in d orbitals. Look for the d orbital electrons: y=10 (from3 d10 ) So, y=10
Step 4: Find x−y
Subtract to get: x−y=10−10=0
Step 5: Find y⋅(x−y)
Multiply y and x−y:y⋅(x−y)=10×0=0