Match the Following:

Column – I	Column – II
A) 1 a.m.u in grams	1) mole
B) This is a relative quantity	2) Avogadro number
C) 1 mole of carbon contains these many atoms	3) Relative atomic mass
D) 12 g of C-12	4) $1.66\times {10}^{-24}$

According to definition 1 a.m.u means the quantitity equal to${\frac{1}{12}}^{\text{th}}$ of the mass of C-12 of carbon atom. So, 1 a.m.u in grams is $1.66\times {10}^{-24}$.

Atomic mass of an element is a relative quantity because we cannot find the atomic mass of an element individually.

One mole of carbon has Avogadro’s number, ${\text{N}}_{\text{A}}$ .One mole of C-12 is equal to 12g.