The element with atomic number 28 is Nickel (Ni). Nickel is a transition metal that belongs to the d-block of the periodic table. It has 28 protons in its nucleus and 28 electrons surrounding the nucleus. Nickel is known for its lustrous, silvery-white appearance and its resistance to corrosion. It has various applications, including being used in alloys, batteries, and as a catalyst in chemical reactions.