" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
- Cara 1 .
55Cs = 1s² 2s² 2p^6 3s² 3p^6 4s² 3d^10 4p^6 5s² 4d^10 5p^6 6s¹
elektron valensi adalah 1
-Cara 2
55Cs = 2,8,18,18,8,1
elektron valensi adalah 1