2.2: Quantum Mechanical Model Worksheet

Master the quantum mechanical model! Practice electron orbitals, quantum numbers, and electron configuration.

1. An electron occupies an orbital where n = 4, l = 2 and m = 0. State the maximum number of electrons that can occupy this orbital. 10 electrons 5 electrons 2 electrons 1 electron 2. Which level can be occupied by a maximum of 10 electrons? s orbital p orbital d orbital f orbital 3. The valence electron of a sodium atom in the ground state can have the quantum numbers (n, l, m, s) 3, 0, 0, -1 2, 1, 1, -1 2. 0, 0, -1 2, 0, 2, -1 4. The quantum numbers (n, l, m, s) for the valence electron of a potassium atom in the ground state can be 3, 0, 0, -1 3, 1, 1, -1 4, 0, 0, -1 4, 2, 1, -1 5. The sets of quantum numbers for the valence electrons of element L are n =3, l = 0, m = 0, s = 1 and n =3, l = 0, m = 0, s = -1 Determine the oxidation number of ion L. +2 -2 +1 -1 6. The designation for the subshell with n = 5 and l = 3 is 5d 5p 5f 5s 7. Which of the following sets of quantum numbers describe an electron in a 3d orbital? n = 3, l = 0, m = +2, s = +1 n = 3, l = 1, m = +1, s = +1 n = 3, l = 2, m = +1, s = +1 n = 3, l = 0, m = +2, s = -1 8. After filling up the 3p orbital, which orbital must electrons next occupy? A spherically shaped orbital A dumb-bell shaped orbital Either a 4s or 3d orbital An orbital of lower energy than 3p 9. A neutral atom of an element has 2 electrons in the first energy level, 8 in the second energy level and 8 in the third energy level. Based on this information alone, we cannot deduce the atomic number of the element anything about the element's chemical properties the total number of electrons in s orbitals the number of neutrons in the nucleus of an atom of the element 10. The two electrons present in an orbital are distinguished by principal quantum number angular momentum quantum number magnetic quantum number electron spin quantum number