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Pengobatan atom dengan lebih dari satu elektron membutuhkan pertimbangan tentang pengaruh interelectronic tolakan, orbital penetrasi ke arah melindungi nuklir, dan tambahan bilangan kuantum yang menentukan energi intrinsik elektron dalam orbit. Semua pertimbangan ini diperlukan untuk memungkinkan pembangunan bentuk modern klasifikasi periodik unsur-unsur.

- from Structure and Bonding (Basic Concepts in Chemistry) (Struktur dan Ikatan (Konsep Dasar dalam Kimia)), a book by Jack Barrett

Active since January 25, 2010

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Indonesian 1,791 61.11 January 25, 2010