Where is the atomic number located in the isotope symbol?

The atomic number is typically located in the lower left corner of the isotope symbol. In the context of an isotope notation, the symbol is usually represented in the format A _Z X, where X is the chemical symbol of the element, Z is the atomic number, and A is the mass number.

For example, in the isotope symbol for Carbon-14, which is represented as ₆¹⁴C, the ‘6’ (the atomic number) is positioned in the lower left corner of the ‘C’ (the chemical symbol for Carbon). The atomic number indicates the number of protons in the nucleus of the atom, which also defines the element itself.