No, it is not possible to change the atomic number of an element, such as lead (atomic number 82), to that of another element, such as gold (atomic number 79), through any physical or chemical means available today.
The atomic number of an element is determined by the number of protons in the nucleus, and altering the atomic number would require changing the number of protons. This process, called transmutation, has been achieved artificially for certain elements through nuclear reactions, but it is not feasible to transmute lead into gold using current technology.
Historically, the pursuit of transmuting lead into gold was a goal of alchemy, an ancient practice that sought to transform or create valuable substances. However, the transmutation of lead to gold has been shown to be highly impractical and economically unviable due to the high energy requirements and the complexity of nuclear reactions involved.
It is important to note that even though lead and gold are both heavy elements and are located relatively close to each other in the periodic table, their distinct atomic numbers make them chemically and physically different elements with unique properties and behaviors.