Examlex
For a Nb atom, the number of protons, neutrons, and electrons in the atom is
Molecules
The smallest particle of a chemical element or compound that can exist independently while retaining all the properties of that element or compound.
Oil-immersion Lens
A microscope lens used with a drop of oil to increase the resolution and magnification by decreasing light refraction.
Fine Focus Knob
A control on a microscope that allows for the precise focusing of the specimen at high magnification.
Concentration Gradient
The process by which molecules move through a solution or gas from an area of higher concentration to an area of lower concentration.
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