Question 1 How is the size of an atom indicated? Question 2 Define atomic mass unit? Question 3 What is the mass of hydrogen atom? Question 4 Name the element used as a standard for atomic mass scale? ATOMIC MASS OF AN ELEMENT Actual masses of the atoms of the elements are very very small. For Ex:The atom of hydrogen has a mass of It is not convenient to use … [Read more...] about Atomic mass