Hi.

Atomic number is represented by Z, Electronic Configuration by EC.

Z = 1.  Hydrogen (H)  EC = 1

Z = 2. Helium (He)     EC = 2

Z = 3. Lithium (Li)       EC = 2, 1

Z = 4. Beryllium (Be)  EC = 2, 2

Z = 5. Boron (B)          EC = 2, 3

Z = 6. Carbon (C)        EC = 2, 4

Z = 7. Nitrogen (N)      EC = 2, 5

Z = 8. Oxygen (O)       EC = 2, 6

Z = 9. Fluorine (F)        EC = 2, 7

Z = 10. Neon (NE)         EC = 2, 8

Z = 11. Sodium (Na)       EC = 2, 8, 1

Z = 12. Magnesium (Mg) EC = 2, 8, 2

Z = 13. Aluminium (Al)    EC = 2, 8, 3

Z = 14. Silicorn (Si)           EC = 2, 8, 4

Z = 15. Phosphorus (P)     EC = 2, 8, 5

Z = 16. Sulphur (S)            EC = 2, 8, 6

Z = 17. Chlorine (CL)          EC = 2, 8, 7

Z = 18. Argon (Ar)             EC = 2, 8, 8

Z = 19. Potassium (K)        EC = 2, 8, 8, 1

Z = 20. Calcium (Ca)        EC = 2, 8, 8, 2

Z = 21. SCANDIUM (Sc)      EC = 2, 8, 8, 3

Z = 22. Titanium (Ti)          EC = 2, 8, 8, 4  

Z = 23. Vandenium (V)    EC = 2, 8, 8, 5

Z = 24. Chromium (Cr)     EC = 2, 8, 8, 8  

Z = 25. Manganese (Mn) EC = 2, 8, 8, 8, 1  

Z = 26. Iron (Fe)                EC = 2, 8, 8, 8, 2

Z = 27. Cobalt (Co)            EC = 2, 8, 8, 8, 3

Z = 28. Nickel (Ni)             EC = 2, 8, 8, 8, 4

Z = 29. Copper (Cu)           EC = 2, 8, 8, 8, 5

Z = 30. Zinc (Zn)                EC = 2, 8, 8, 8, 6

Hope it helps!