How to calculate mass number?

Assuming the nuclei to be spherical in shape, how does the surface area of a nucleus of mass number A_1 compare with that of a nucleus of mass number A_2 ?

A nucleus undertgoes beta -decay. How does its (i) mass number (ii) atomic number change ?

Calculate the mass of the following: (i) 0.5 mole of N_(2) gas (mass from mole of molecule) (ii) 0.5 mole of N atoms (mass from mole of atom) (iii) 3.011 × 10_(23) number of N atoms (mass from number) (iv) 6.022 × 10_(23) number of N_(2) molecules (mass from number)

If mass of one atom is 3.32 xx 10^(-23)g, then calculate number of nucleons (neutrons and protons) present in 2 atoms of the element:

Answer the following questions : Calculate the number of coulombs required to deposit 20.25 g of aluminium (at. mass = 27) from a solution containing Al^(+3)

If the diameter of two different nuclei are in the ratio 2: 1, then calculate the ratio of their mass number

How would you calculate the equivalent mass of a salt ?

Calculate : Calculate the number of molecules in 4.4 gm of CO_(2) . [Atomic mass of C = 12,0 = 16]

How are the radius of nucleus r and mass number (A) related to each other?

How is simple cubic unit cell formed ? Calculate the number of atoms in a simple unit cell.