The element with atomic number 10 is neon. Neon is a colorless noble gas that is commonly found in the universe, particularly in stars. However, on Earth, neon is relatively rare in the atmosphere, making up only a very small fraction of the air we breathe. It is obtained through the process of fractional distillation of liquid air. Neon is widely used in various applications, including neon signs, lasers, and cryogenic refrigeration.