Which of the following statements are true? For the false statements, correct them. a. Most of the known elements are metals. b. Element 118 should be a nonmetal. c. Hydrogen has mostly metallic properties. d. A family of elements is also known as a period of elements. e. When an alkaline earth metal, A, reacts with a halogen, X, the formula of the covalent compound formed should be A2X
Reduction Potentials & Electrochemical Cells electrochemical cell - device capable of either generating electrical energy from • chemical reactions (voltaic or galvanic cell) or facilitating chemical reactions through introduction of electrical energy (electrolytic cell) • electrons flow from oxidation side of cell to reduction side through wire • salt bridge is used to allow ions to flow between cells and balance charge • cathode - negatively charged electrode • anode - positively charged electrode • standard reduction potential - measure (in volts) of tendency for chemical species to be reduced when all elements are in their standard states • the more positive the reduction potential, the more likely a species will be reduced • the more
