The value of a mole is 6.022 ×. The other name of mole is Avogadro's number.
The mole is define as 6.022 × of the chemical unit like atoms , molecules, ions or others.It is very convenient unit because of huge numbers o f atoms, molecules or others. This is very important unit used by chemist.
One mole = atomic Mass of atoms / molecular mass of molecule
Example: one mole of sodium = 23 g = atomic mass
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Longitudinal. (just remember that Transverse waves are perpendicular. T is like an inverted perpendicular sign)
7 is atomic symbol 9 is atomic density 8 is the atomic number