chemistry

Isotopes of lutetium

Isotopes of lutetium 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 Isotopes of lutetium rather than just read about it. In short: Naturally occurring lutetium (71Lu) is composed of one stable isotope 175Lu (97.40% natural abundance) and one long-lived radioisotope, 176Lu with a half-life of 37 billion years (2.60% natural abundance). Forty synthetic radioisotopes have been added from 149Lu to 190Lu, with the most stable being 174Lu with a half-life of 3.31 years and 173Lu with a half-life of 1.37 years.

Key takeaways

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

Reference excerpt

Naturally occurring lutetium (71Lu) is composed of one stable isotope 175Lu (97.40% natural abundance) and one long-lived radioisotope, 176Lu with a half-life of 37 billion years (2.60% natural abundance). Forty synthetic radioisotopes have been added from 149Lu to 190Lu, with the most stable being 174Lu with a half-life of 3.31 years and 173Lu with a half-life of 1.37 years. All of the remaining radioactive isotopes have half-lives that are less than 9 days, and the majority of these have half-lives that are less than half an hour. Of the meta states known for this element, the most stable are 177m3Lu (t1/2 160.4 days) and 174mLu (t1/2 142 days). The primary decay mode before the most abundant stable isotope, 175Lu, is electron capture (with some alpha and positron emission), leading to ytterbium or less often thulium isotopes, and the primary mode after is beta emission giving hafnium isotopes. All isotopes of lutetium are either radioactive or, for the lone stable isotope 175Lu, observationally stable, meaning that it is predicted to be radioactive (to alpha decay) but no decay has been observed.

List of isotopes

Lutetium-177

Lutetium (177Lu), which decays with the emission of a low-energy electron, is useful for treating some cancerous tumors. Several compounds of 177Lu are available for this purpose: 1) Lutetium chloride, LuCl3, sold under the brand name Lumark among others, is used for radiolabeling other medicines, either as an anti-cancer therapy or for scintigraphy (medical radio-imaging). Its most common side effects are anaemia (low red blood cell counts), thrombocytopenia (low blood platelet counts), leucopenia (low white blood cell counts), lymphopenia (low levels of lymphocytes, a particular type of white blood cell), nausea (feeling sick), vomiting and mild and temporary hair loss. 2) Lutetium (177Lu) oxodotreotide, also known as Lutetium (177Lu) dotatate ("Lutathera"), has been approved for some types of tumors. 3) Lutetium (177Lu) vipivotide tetraxetan ("Pluvicto") has also been approved.

See also Daughter products other than lutetium

Isotopes of hafnium Isotopes of ytterbium Isotopes of thulium Isotopes of erbium

References

Worked examples

Example 1 — a first encounter with Isotopes of lutetium

Start with the simplest possible case. Write down what Isotopes of lutetium 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 Isotopes of lutetium 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 Isotopes of lutetium 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 Isotopes of lutetium

In research: Isotopes of lutetium 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 Isotopes of lutetium 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: Isotopes of lutetium is common in secondary-school and first-year university syllabi. It links to neighbouring topics Isotopes of lutetium, Lists of isotopes by element, Lutetium, so understanding it makes those chapters shorter.
In everyday life: Look for Isotopes of lutetium 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Isotopes of lutetium in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Isotopes of lutetium 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 Isotopes of lutetium out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Isotopes of lutetium in simple terms?

Why does Isotopes of lutetium 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 Isotopes of lutetium?

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 Isotopes of lutetium.