chemistry

Gold chalcogenides

Gold chalcogenides is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Gold chalcogenides rather than just read about it. In short: Gold chalcogenides are compounds formed between gold and one of the chalcogens, elements from group 16 of the periodic table: oxygen, sulfur, selenium, or tellurium. Gold(III) oxide, Au2O3.

Key takeaways

Gold chalcogenides belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Gold chalcogenides to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Gold chalcogenides from memory before moving on to harder problems.

Reference excerpt

Gold chalcogenides are compounds formed between gold and one of the chalcogens, elements from group 16 of the periodic table: oxygen, sulfur, selenium, or tellurium.

Gold(III) oxide, Au2O3. Decomposes into gold and oxygen above 160 °C, and dissolves in concentrated alkalis to form solutions which probably contain the [Au(OH)4]− ion Gold(I) sulfide, Au2S. Formed by reaction of hydrogen sulfide with gold(I) compounds. Gold(III) sulfide, Au2S3, claimed material but unsubstantiated. Gold tellurides: Au2Te3, Au3Te5, and AuTe2 (approximate formulas) are known as non-stoichiometric compounds. They show metallic conductivity. Au3Te5 is a superconductor at 1.62 K. Gold telluride minerals, such as calaverite and krennerite (AuTe2), petzite (Ag3AuTe2), and sylvanite (AgAuTe2), are minor ores of gold (and tellurium). See telluride minerals for more information.

References

Worked examples

Example 1 — a first encounter with Gold chalcogenides

Start with the simplest possible case. Write down what Gold chalcogenides claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Gold chalcogenides before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Gold chalcogenides ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Gold chalcogenides

In research: Gold chalcogenides appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Gold chalcogenides in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Gold chalcogenides is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gold compounds, Inorganic compound stubs, Non-stoichiometric compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Gold chalcogenides outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Gold chalcogenides in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Gold chalcogenides means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Gold chalcogenides out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Gold chalcogenides in simple terms?

Gold chalcogenides are compounds formed between gold and one of the chalcogens, elements from group 16 of the periodic table: oxygen, sulfur, selenium, or tellurium. Gold(III) oxide, Au2O3.

Why does Gold chalcogenides matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Gold chalcogenides?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Gold chalcogenides.