1. 1. Associate Professor Chemistry Winsome College, Dhaka
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4. 4. 1 1840 P 1 +1 1.671024g 1.601019g N 1 0 1.6751024 g 0 e 1 1840 1 9.111028 g 1.601019 g
5. 5. ; 12 - = 12 1 12
6. 6. , 16 ? 162=32 , , ( ) ( ) Z A (Al) 13 27, =27(A)13(Z)=14
7. 7.
8. 8. ;- ; () () () ;-() , Tc Sm Sr (2) Co
9. 9. (3) I , - (4) P (5) - ;- P ;- Co , ;-
10. 10.
11. 11. ;- () () , () -
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13. 13. ;- Zn +H2SO4 =ZnSO4+H2
14. 14. Cl Cl 75% 25% = 3575100 + 3725100=35.5
15. 15. I I P Sm Z Z Z Z 11 1 11 1 14 1 30
16. 16.
17. 17. Thank You