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# strontium

«strontium» in Mova's school dictionary: **a soft, silvery metal, a chemical element with the symbol…** — its meaning for a pupil, its sense in the lessons and examples, with 2 sentences of Mova's corpora that use it.

### part of speech

noun (strontium, uncountable)

### meaning for a pupil

1) Strontium is a soft, silvery metal, a chemical element with the symbol Sr and atomic number 38. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/#m1)

2) Strontium compounds give fireworks and flares a bright red colour. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/#m2)

### sense in the lessons

In science lessons on elements and the periodic table it is in the same group as calcium and magnesium. Fireworks are a fun example: strontium makes red, copper makes blue, barium makes green, sodium makes yellow. It is named after Strontian, a village in Scotland where it was found. A radioactive kind, strontium-90, is dangerous and was released by nuclear tests and accidents. Phrases: «strontium salts», «strontium-90».

### examples

- Strontium makes fireworks burn bright red. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/#x1)
- The symbol for strontium is Sr. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/#x2)
- Strontium was named after a village in Scotland. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/#x3)
- Strontium is a metal in the same group as calcium. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/#x4)
- Red emergency flares contain strontium. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/#x5)
- Strontium-90 is a dangerous radioactive form. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/#x6)

### note

Uncountable. Said «STRON-tee-um» or «STRON-shum». Chemical symbol Sr with a small r. Ordinary strontium is not radioactive; only some kinds (isotopes) are.

### In the corpora

- [Every kind of metal gives back its own colour: strontium red, barium green, sodium yellow, copper blue.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/26-colours-of-fire-fireworks/3/)
- [The colours of fireworks come from different metals: strontium gives red, barium green, sodium yellow and copper blue.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/26-colours-of-fire-fireworks/7/)

### Trees and pragmatics

[Every meaning and example of «strontium» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/strontium/), each sentence with its dependency tree and frames.