Metallic solids or metallic structures experience metallic bonds which are the forces of attractions between the sea of electrons and the nucleus of the metallic atoms. They share a network of highly delocalized electrons.
I therefore think that the packing efficiency decreases as the number of nearest neighbors decreases.
One compound can be differentiate from other by its composition although both look same. The diamond has the chemical formula of carbon (c) as it is a repeating unit of carbon which has shining features. On the other hand zirconia is zirconium dioxide (Zr. When it is crystallized it becomes shiny as like diamond. However the look of the two are meanwhile similar the composition is totally different as well the molar mass.
Particles are moving from regions of high concentration to low concentration. Hence, option A is correct.
<h3>What is diffusion?</h3>
Diffusion is the movement of a substance from an area of high concentration to an area of lower concentration.
Diffusion results from the random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration.
This process can neither be stopped nor reversed. It occurs when the medium surrounding the cell has a higher water concentration than the cell.
Hence, option A is correct.
Learn more about the diffusion here:
brainly.com/question/24746577
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<span>Similarities:
-Physical properties can be observed or measured without changing the composition of matter.
-Physical properties are used to observe and describe matter.
</span><span>Differences;
-Chemical properties are only observed during a chemical reaction and thus changing the substance's chemical composition.
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