Define atomic mass of an element.

The atomic mass of an element is the weighted average of the atomic masses of different isotopes of that element .This explains,why atomic masses of many elements show large departures from integer values.However ,even if we consider msases of individual isotpes,they are not strictly integer multiples of the mass of a hydroen atom.How do yo account for this fact?

An element having a density 11.2"g cm"^(-3) forms a fcc lattice with edge of 4xx10^(-3) cm. Calculate the atomic mass of the element.

Define mass number of an element.

What were the units used for expressing atomic masses of elements initially ?

3.011 xx 10^22 atoms of an element weighs 1.15 gm . The atomic mass of the element is :

An element crystallising in body centred cubic lattice has an edge length of 500 pm. If its density is 4gcm^-3 , the atomic mass of the element is

An element E crystallizes in boyd centred cubic structure. If the edge lengh of the cell is 1.469xx10^-10m and the denstiy is 19.3 g cm^-3 , calculate the atomic mass of this element. Also calculate the radius of an atom of the element.