No, the atomic number of an element and its density cannot be reduced.
The atomic number of an element represents the number of protons in the nucleus of an atom. This value is fixed and unique to each element. It determines the identity of the element and cannot be changed without fundamentally altering the nature of the atom itself.
Similarly, the density of an element is a physical property that is determined by the mass of the element and its volume. The density of an element can vary depending on its isotopic composition and physical conditions, but it cannot be reduced arbitrarily without altering the element or changing the physical conditions in which it exists.
In summary, the atomic number and density of an element are inherent properties that cannot be reduced or modified without significant changes to the element itself or its surrounding conditions.