The Mystery of Isotopic Symbol 127 276

The isotopic symbol 127 276 corresponds to a new element. According to the given symbol, the number on the top left represents the mass number, which is the sum of protons and neutrons. In this case, the mass number is 276. The number on the bottom left represents the atomic number, which is the number of protons. Therefore, the number of protons is 127.

Since the element is neutral, it will have the same number of electrons as protons, which is also 127. The difference between the mass number and the atomic number gives the number of neutrons. In this case, the number of neutrons is calculated as 276 - 127 = 149. Hence, the correct number of subatomic particles for this new element is Protons: 127, Neutrons: 149, and Electrons: 127.