Catalysis and band theory

They also are strong and hard with high melting points (MP) and high boiling points (BP). They conduct heat and cold well. Noble metals are less susceptible to acidic effects and corrosion. 

The pH scale, which is logarithmic, is used to define the acidity or alkalinity of a solution (i.e. in terms of the concentration of hydrogen ions (Hconc) in solutions (Bond 1987)). To a first approximation, the pH of a solution is defined as — logio[Hconc]- A neutral solution at room temperature (RT) has a pH of 7. Acids have pH values less than this. 

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