strontium
Let an agent identify strontium and its properties, relay isotopes, occurrence, uses and health aspects from reference sources, and distinguish it from neighbouring alkaline earth metals.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent identify strontium and its properties, relay isotopes, occurrence, uses and health aspects from reference sources, and distinguish it from neighbouring alkaline earth metals.
A chemical element with symbol Sr and atomic number 38, a soft silvery alkaline earth metal that reacts with air and water, occurring in the minerals celestine and strontianite; strontium compounds give a red colour to fireworks and flares, were used in cathode ray tube glass, and are used in ceramics and magnets, the radioactive isotope strontium-90 is a fission product of concern in nuclear fallout, and strontium ranelate has been used in osteoporosis treatment; the element has four stable isotopes and many radioactive ones from strontium-73 upward.
What it is for: Pyrotechnics, ceramics, magnets and specialised uses.
It can be relay properties and isotopes; explain occurrence and uses; relay health and environmental aspects; distinguish from calcium and barium.
Distinguishing features
Red flame colour
Strontium-90 fallout concern
Chemically similar to calcium
Celestine and strontianite ores
What it looks like
A silvery metal that turns yellowish in air.
Physical character
atomic number: 38 Z
standard atomic weight: 87.62 u
melting point: 777 degrees C
strontium-90 half-life: 28.8 years
How it is recognised
Element 38, symbol Sr
Alkaline earth metal of red fireworks
Calcium and barium are the neighbouring alkaline earth metals
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is adjacent to - element 20 in the same group
has isotope - a fission product
In practice
Families and kinds
strontium metal
strontium compounds such as carbonate, nitrate and titanate
stable isotopes 84, 86, 87 and 88
radioactive isotopes including strontium-90 and light isotopes from strontium-73 to strontium-78
strontium in medicine and dating
Identifiers
symbol Sr
CAS 7440-24-6
Standards and regulation
Radiation protection limits for strontium-90
Chemical safety data sheets
Pyrotechnics regulations
Failure modes and hazards
Strontium-90 uptake in bone
Reactivity of the metal with water
Confusing stable and radioactive strontium
Also called
+1
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.strontium
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Identify What strontium is.
Identity.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of strontium? definition
- Is the question about strontium or a neighbouring element? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and why does strontium-90 matter? definition
- Which entry fits the specific isotope? action
Source Occurrence and production.
Supply.
Occurrence
Occurrence.
Occurrence
Occurrence.
- Where does strontium occur, and how is it produced? provenance
- Which entry fits celestine? action
Supply
Supply.
Supply
Supply.
- Who produces strontium, and how has demand changed, with sources? measurement
- Which sources are cited? provenance
Use Uses and health.
Application.
Uses
Uses.
Uses
Uses.
- How is strontium used in pyrotechnics, ceramics, magnets and other products? provenance
- Which references are standard? provenance
Health
Health and environment.
Health
Health.
- What are the health effects of stable and radioactive strontium, and what about strontium in medicine, in general terms? provenance
- Is the user asking about personal exposure or treatment, which needs a professional? boundary
Context History and science.
Context.
Discovery
Discovery.
Discovery
Discovery.
- How was strontium discovered near Strontian in Scotland and isolated by Davy? provenance
- Which entry fits the history of chemistry? action
Science
Isotope science.
Science
Science.
- How are strontium isotope ratios used in geology, archaeology and food provenance? provenance
- Which entry fits isotope geochemistry? action
What the second pass must settle
- Should strontium-90 be a separate primary entry?
- How should reference data be linked?
- The registry entry has merged aliases naming short-lived isotopes; should they be split off?