Question 1:

What does the electron configuration of an atom represent?

Explanation: The correct answer is B) The arrangement of electrons in energy levels or orbitals. The electron configuration of an atom describes how the electrons are distributed among the available energy levels or orbitals. It provides information about the organization and distribution of electrons within an atom.

Question 2:

What is the maximum number of electrons that can occupy the p orbital in an atom?

Explanation: The correct answer is D) 8. The p orbital can accommodate a maximum of 6 electrons: 2 electrons in each of the three p orbitals (px, py, pz). This follows the Pauli exclusion principle, which states that no two electrons within an atom can have the same set of quantum numbers.

Question 3:

Which of the following elements has the electron configuration 1s2 2s2 2p6 3s2 3p6?

Explanation: The correct answer is D) Neon (Ne). The electron configuration 1s2 2s2 2p6 3s2 3p6 corresponds to the noble gas neon (Ne). Neon has 10 electrons, with 2 electrons in the 1s orbital, 2 electrons in the 2s orbital, 6 electrons in the 2p orbital, and the remaining 2 electrons in the 3s orbital.

Question 4:

Which sublevel comes after the 3p sublevel in the electron configuration?

Explanation: The correct answer is C) 4p. In the electron configuration, the sublevels are ordered by increasing energy. After the 3p sublevel, the next sublevel is the 4s sublevel. However, in terms of increasing principal quantum number, the next sublevel would be the 4p sublevel.

Question 5:

What is the electron configuration of an oxygen (O) ion with a charge of -2?