Final answer:
The statement that electrons have spin quantum numbers of +1/2 and -1/2 is TRUE. These numbers represent the two possible spin states of electrons, known as spin-up and spin-down, and are a critical part of quantum mechanics and the Pauli exclusion principle.
Step-by-step explanation:
The statement is TRUE: The +1/2 and -1/2 values that electrons possess are known as the spin quantum number (ms). In quantum mechanics, electrons have two possible spin states, which mathematically correspond to these quantum numbers. This spin quantum number is essential for describing the intrinsic angular momentum, or 'spin', of electrons, which is a fundamental property of particles like electrons. The spin-up state is represented by ms=+1/2, while the spin-down state is represented by ms=-1/2. Furthermore, according to the Pauli exclusion principle, no two electrons in the same atom can have the same set of quantum numbers, which includes the requirement that they must have opposite spins if they are in the same orbital.