I am pretty sure its b, Ag atoms and localized electrons in silver
The atomic number of copper is 29.
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Blade resistance hair motion pull down
<span>The first method to determine the chemical composition of a substance in space was using light. By determining red shift in the observed spectrum of light they could determine the elements they were observing. Different elements change the way light behaves and from this scientists can determine the makeup of things such as stars and nebulas.</span>