D-block (for diffuse) elements consist of the transition metals (group 3-12 on the periodic table) in which the outermost electron shell is the D orbital. D-block elements form at least one stable ion with an incompletely filled electron subshell.
... peak in Mt. Ichara, 4860 ft., while the Eastern-Sakhalin Mountains's highest peak is Mt. Lopatin (1609 m, 5279 ft.) is also the island's highest mountain. ...