Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

4. Molecular Compounds

Electron Geometry (Simplified)

GOB Chemistry

4. Molecular Compounds

Electron Geometry (Simplified)

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Multiple Choice

Determine the number of electron groups for the following cation:AsBr₂⁺.

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Identify the central atom in the cation AsBr2+. In this case, the central atom is arsenic (As).

Determine the number of valence electrons for the central atom, arsenic (As). Arsenic is in group 15 of the periodic table, so it has 5 valence electrons.

Consider the charge of the cation. The cation has a +1 charge, which means it has lost one electron. Therefore, the total number of valence electrons for AsBr2+ is 5 - 1 = 4.

Count the number of atoms bonded to the central atom. In AsBr2+, there are two bromine (Br) atoms bonded to arsenic.

Calculate the number of electron groups around the central atom. Each bond (single, double, or triple) and lone pair counts as one electron group. In AsBr2+, there are two bonds and one lone pair, resulting in a total of 3 electron groups.