If a laser beam in incident on a translucent block at a certain angle, we expect the angle same laser beam exiting the block to be
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Ответ:
This is not easy. For many of the chemical elements there are several known isotopes. Isotopes are atoms with different atomic masses which have the same atomic number. The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.
Explanation: