| 单词 | electromotive series |
| 释义 | electromotive series(electrochemical series) A series of chemical elements arranged in order of their electrode potentials. The hydrogen electrode (H+ + e → ½H2) is taken as having zero electrode potential. Elements that have a greater tendency than hydrogen to lose electrons to their solution are taken as electropositive ; those that gain electrons from their solution are below hydrogen in the series and are called electronegative . The series shows the order in which metals replace one another from their salts; electropositive metals will replace hydrogen from acids. The chief metals and hydrogen, placed in order in the series, are: potassium, calcium, sodium, magnesium, aluminium, zinc, cadmium, iron, nickel, tin, lead, hydrogen, copper, mercury, silver, platinum, gold. This type of series is sometimes referred to as an activity series |
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