thorium-228
A radioactive isotope of thorium, 22890Th, having a half-life of 1.9 yearsA radioactive isotope of thorium, 22890Th, having a half-life of 1.9 years; it occurs naturally in small amounts, as member of the thorium-232 decay chain.
Meaning
1 senses(uncountable)A radioactive isotope of thorium, 22890Th, having a half-life of 1.9 years; it occurs naturally in small amounts, as member of the thorium-232 decay chain.
radioactive isotope of thorium with mass number 228
Synonyms
1 synonymsClose in meaning
- radioactive isotope of thorium with mass number 228:radiothorium
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable