Question

Which one of the following statements about orbitals is INCORRECT?

Answer 1

3) orbitals can hold two electrons provided they are spinning in the same direction

We define an orbital in chemistry as a region in space where there is a high probability of finding an electron.

Each orbital holds a maximum of two electrons which spin in opposite direction according to Pauli exclusion principle.

According to this principle no two electrons can have the same set of quantum numbers. As a result, the spin quantum numbers of two electrons in the same orbital must differ hence they spin in opposite directions.

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Answer 2

3) is the incorrect statement. Electrons must pair with opposite spins since they are both negatively charged and would therefore repel each other.