10. Periodic Properties of the Elements

Which of the following represents the correct electron configuration for a neutral carbon atom?

What is the primary difference between the 1s and the 2s orbitals?

Which of the following is the correct electron configuration for beryllium (Be)?

How many electron-containing orbitals are present in a neutral atom of arsenic (atomic number 33)?

Which of the following is the correct electron configuration for potassium (K)?

Which ground-state atom has an electron configuration described by the following orbital diagram? 1s: ↑↓ 2s: ↑↓ 2p: ↑↓ ↑↓ ↑↓

Which of the following best describes a cathode ray?

Which of the following is the correct ground-state electron configuration for the Co^{3+} ion?

Which statement best describes electron energy levels and their location in an atom?

How many energy shells are present in a neutral zinc (Zn) atom?

What is the electron configuration of the chloride ion (Cl⁻) after a chlorine atom gains an electron?

For a hydrogen atom, what is the energy (in electron volts, eV) of an electron in the n=4 excited state?

Which of the following best describes an orbital diagram for the electron configuration of nitrogen (atomic number 7)?

Which of the following electron configurations represents an excited-state nitrogen atom?

Which of the following is the correct electron configuration for bromine (Br, atomic number 35)?