An isotope has 15 protons, 16 neutrons, and 15 electrons. What is the isotopic notation of the isotope

is the isotopic notation of the atom

Explanation:

The isotope notation is:

Where a is the mass number = Number of protons + Number of neutrons

b is atomic number = Number of protons

The atomic number define the nature of the atom, the element with atomic number = 15 is phosphorus, P:

a = 15 protons + 16 neutrons = 31

b = 15

is the isotopic notation of the atom.

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