2.68 $$\times$$ 10^-3 moles of a solution containing an ion Aⁿ⁺ require 1.61 $$\times$$ 10^-3 moles of $$MnO_4^-$$ for the oxidation of An⁺ to $$AO_3^-$$ in acid medium. What is the value of n?

An isotone of $${}_{32}^{76}Ge$$ is

Many elements have non-integral atomic masses because:

When alpha particles are sent through a thin metal foil, most of them go straight through the foil because