Does a TEM image detect all the elements in a mineral sample? Why or why not?
What will be an ideal response?
Most of the size of an atom consists of the cloud of electrons that orbit the nucleus. If there are many electrons in a small area around the nucleus, then there is a good chance that electrons fired in the TEM will collide with an orbiting electron and bounce off elsewhere in the microscope rather than continuing through to the detector. If, however, the electrons are widely spaced around a nucleus, then the fired electrons may pass through the atom without hitting any obstacles. This means that the shadows in the TEM image may not represent all of the types of atoms in a mineral, but rather only the atoms with closely clustered electrons.
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Answer the following statement true (T) or false (F)
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