An element consists of many atoms with the same atomic number, and each atom has its own nucleus. Therefore, an element contains as many nuclei as there are atoms in that element.
The number of nuclei in an element can vary depending on the amount of the element present. It is determined by the Avogadro's constant, which states that there are approximately 6.022 x 10^23 atoms (or molecules) in one mole of a substance. This value, known as Avogadro's number, represents the number of particles in one mole of a substance.
So, if you have one mole of an element, it will contain approximately 6.022 x 10^23 nuclei. This number is incredibly large, reflecting the microscopic scale of atoms and the vast number of atoms present in macroscopic samples of substances.
It's important to note that the number of nuclei in an element can vary depending on the quantity of the element being considered. For example, if you have half a mole of an element, you would have approximately half of Avogadro's number of nuclei.