29. The high density (＞ 19 g/cm³) of tungsten, rhenium, osmium, iridium, platinum, and gold metals is due to
(A) Born-Oppenheimer approximation
(B) iron group effect
(C) island of stability theory
(D) lanthanide contraction
(E) lazy pair effect

1. 題目解析這道考題主要是針對某些...