Choose from the following statements which are inconsistent with the implications and postulates of Dalton's atomic theory.
I. Two oxygen atoms combine with one nitrogen atom to form a molecule of nitrogen dioxide.
II. One lithium atom can have a mass of 6 amu while another can have a mass of 7 amu.
III. Atoms are the smallest particles of all matter.
IV. Atoms can be created. 
V. Atoms of a compound are fixed and cannot rearrange.