Introduction. Copper is a heavy metal; its atomic weight is 63.54. After silver, it is the best conductor of heat and electricity. In compounds, it occurs in oxidation states I or II. Copper has a very pronounced tendency to form complexes. The stability constants of copper complexes are generally higher than those of other divalent metals…
Zinc and its role in plant life.
Introduction. Zinc is a heavy metal; its atomic mass is 65.38. It exhibits relatively good thermal and electrical conductivity. It forms compounds only in the +2 oxidation state. Zinc dissolves even in dilute acids, displacing hydrogen. In nature, it never occurs in its native state. Zinc, like copper, forms complex compounds,…
Boron and its role in plant physiology.
Introduction. Boron is a typical nonmetal with a low atomic mass. The most well-known boron compounds are boric acid and its salts – borates; boron occurs in them as a trivalent element. The complex-forming properties of the borate ion are well-known. Research on boron as a trace element dates back to the first years of this century. Research has demonstrated the beneficial effects of boron on…