Which of the following statements is true? A)The exact location of an electron can be determined if we know its energy. B)An electron in a 2s orbital can have the same n,l,and m_l quantum numbers as an electron in a 3s orbital. C)Ni has two unpaired electrons in its 3d orbitals. D)In the buildup of atoms,electrons occupy the 4f orbitals before the 6s orbitals. E)Only three quantum numbers are needed to uniquely describe an electron.

Question

Quizplus · Accepted Answer

The electron configuration of Ni is [Ar] 3d8 4s2, which means there are two unpaired electrons in the 3d orbitals, specifically in the 3d7 and 3d8 orbitals.

The other statements are false. A is false because of the Heisenberg uncertainty principle, which states that it is impossible to know the exact location and energy of an electron simultaneously. B is false because the principal quantum number (n) determines the energy level, and electrons in different energy levels cannot have the same quantum numbers. D is false because electrons occupy the 6s orbital before the 4f orbital in the buildup of atoms. E is false because four quantum numbers (n, l, mℓ, and mS) are needed to uniquely describe an electron.

Which of the Following Statements Is True