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Definition
Protactinium, a radioactive chemical element with atomic number 91.
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How it's used
Technical terms for chemical elements like this are almost exclusively used in academic or scientific contexts. Outside of a chemistry classroom or research paper, you will rarely hear this word spoken in daily life. It follows the standard naming convention for metal elements in Chinese, which uses the metal radical.
Examples
Protactinium is a very rare metallic element.
Do you know what the chemical properties of protactinium are?
Related words
Common phrases
protactinium element
Grammar color guide
Noun
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Adverb
Pronoun
Classifier
Particle
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Grammar guides
- TonesCantonese has six tones, and the tones can change in certain grammatical contexts. Learn the six tones and the rules for tone change.
- Time and datesClock time, days of the week, months, and years. The patterns you need to make plans and talk about when things happen.
- Modal verbsHow to say can, will, may, should, must, and want. The core modal verbs of Cantonese and the differences that trip up beginners.
