10. Periodic Properties of the Elements

Which of the following is the correct electron configuration for an oxygen atom?

Given the electron configuration 1s^2 2s^2 2p^3, how many unpaired electrons are present in this atom?

Which of the following represents the correct ground-state electron configuration for silicon (Si)?

Which of the following represents the correct orbital diagram for a neutral germanium (Ge) atom?

Which of the following statements is NOT true about electron configurations?

Which of the following is the correct electron configuration for antimony (Sb)?

Which of the following is the correct electron configuration for the element boron (B)?

Which of the following best explains how electrons gain energy to move to higher energy levels in the electron cloud?

In the third energy level (n = 3), how many electrons can occupy the 3d subshell?

Given the following orbital diagram, which element does it represent? 1s: ↑↓ 2s: ↑↓ 2p: ↑↓ ↑↓ ↑↓ 3s: ↑↓ 3p: ↑↓ ↑↓ ↑↓ 4s: ↑↓ 3d: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ Choose the correct element.

Which of the following is the correct electron configuration for a neutral oxygen atom?

Which of the following is a feature of the electron cloud model of an atom?

Which of the following represents the correct electron configuration for a neutral atom of scandium (atomic number 21)?

Which of the following is the correct electron configuration for krypton (Kr)?

Which one of the following species has the electron configuration 1s^2 2s^2 2p^6?