Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

9. Quantum Mechanics

Bohr Model

General Chemistry

9. Quantum Mechanics

Bohr Model

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Multiple Choice

Which of the following describes the correct Bohr model for a sulfur atom?

A nucleus with 16 protons and 16 neutrons, with electrons in orbits: 2 in the first shell, 8 in the second shell, and 4 in the third shell.

A nucleus with 16 protons and 16 neutrons, with electrons in orbits: 2 in the first shell, 8 in the second shell, and 8 in the third shell.

A nucleus with 16 protons and 16 neutrons, with electrons in orbits: 2 in the first shell, 8 in the second shell, and 6 in the third shell.

A nucleus with 16 protons and 16 neutrons, with electrons in orbits: 2 in the first shell, 6 in the second shell, and 8 in the third shell.

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Verified step by step guidance

Understand the Bohr model: The Bohr model describes atoms with electrons in fixed orbits around the nucleus. Each orbit corresponds to a specific energy level or shell.

Identify the atomic number of sulfur: Sulfur has an atomic number of 16, which means it has 16 protons in its nucleus.

Determine the number of electrons: Since sulfur is neutral, it also has 16 electrons to balance the 16 protons.

Distribute electrons in shells according to the Bohr model: The first shell can hold up to 2 electrons, the second shell can hold up to 8 electrons, and the third shell can hold up to 18 electrons, but for sulfur, only 6 electrons are needed to complete the third shell.

Verify the electron configuration: For sulfur, the correct electron configuration in the Bohr model is 2 electrons in the first shell, 8 electrons in the second shell, and 6 electrons in the third shell, matching the correct answer provided.