Periodic Properties (I)
Diversity in the living world
Solid State (P)
Reproduction in organisms
U&D, Vector, Kinematics (11th)
Periodic Properties (I) , Atomic Structure (P) , Nomenclature (O)
Diversity in the living world, Reproduction in organisms
The Mole Concept
One Mole = Avogadro's Number [NA] = 6.023 x 1023. It is the number of atoms present in exactly 12 g of C -12 isotope.
Atomic weight [A] : Atomic weight is the relative weight of one atom of an element with respect to a standard weight
isotope u (atomic mass unit) weight :
One amu = the part by weight of an atom of C - 12 isotope = = 1.66 × 10-24g
Change of scale for atomic weight : If an amu is defined differently as (1/x) th party by weight of an atom of C-12 isotope rather (1/12) th part than the atomic weight (A') can be derived as :
where, A= conventional atomic weight.
Molecular weight (MW) : Like atomic weight, it is the relative weight of a molecule of a compound with respect to amu weight.
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