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

3. Ionic Compounds

Naming Monoatomic Cations

GOB Chemistry

3. Ionic Compounds

Naming Monoatomic Cations

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0:51 minutes

Problem 24e

Textbook Question

Write the name for each of the following ions (include the Roman numeral when necessary):
e. Au³⁺

Verified step by step guidance

Determine the element represented by the symbol 'Au'. The symbol 'Au' corresponds to gold, which is a transition metal.

Identify the charge on the ion. The superscript '³⁺' indicates that the ion has a +3 charge.

Recall that transition metals often require a Roman numeral in their name to indicate the charge of the ion. This is because transition metals can form ions with different charges.

Combine the name of the element (gold) with the Roman numeral representing the charge (III) in parentheses. The Roman numeral III corresponds to a +3 charge.

The name of the ion is 'gold(III) ion'.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Ionic Charge

Ionic charge refers to the electrical charge that an ion carries, which is determined by the loss or gain of electrons. In the case of Au³⁺, the '³⁺' indicates that the gold ion has lost three electrons, resulting in a positive charge. Understanding ionic charges is essential for naming ions correctly, as it informs the oxidation state of the element.

Roman Numerals in Nomenclature

Roman numerals are used in chemical nomenclature to indicate the oxidation state of transition metals in compounds. For example, in the name 'gold(III)', the Roman numeral 'III' signifies that gold has a +3 oxidation state. This practice is crucial for distinguishing between different ionic forms of the same element, especially for metals that can exhibit multiple oxidation states.

Naming Cations

Naming cations involves identifying the element and its charge. For transition metals like gold, the name of the element is followed by the oxidation state in Roman numerals. In the case of Au³⁺, the correct name is 'gold(III)', which reflects both the identity of the ion and its positive charge, ensuring clarity in chemical communication.

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