Lithium has a work function of 2.3ev. If 400nm light is incident on it, what is the maximum kinetic energy ? Chemistry Bohr Model of the Atom Calculations with wavelength and frequency
No. A comma precedes such as when what follows is an example of whatever went before. In this case, it is nonrestrictive. (For nonrestrictive constructions: use a comma.).
Using a Comma before And in a List. Writers frequently wonder whether a comma should go before the conjunction and in a list of three or more items. Despite the fact that not all style books agree on this issue, we recommend using a comma after the next-to-last item in a seriesâthe serial comma, as it is called.