What is Zeff for a 4d electron in a Mo atom? The atomic number of Mo is 42.

a. a clone will be physically identical to the original, but won’t be genetically identical

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nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

c. 75.7

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