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Meaning : A trivalent metalloid element. Occurs both in a hard black crystal and in the form of a yellow or brown powder.
Synonyms : b, boron
एक त्रिसंयोजक रासायनिक तत्व।
একটি ত্রিসংযোগ রাসায়নিক তত্ত্ব
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Atomic number 5 meaning in Bengali (Bangla).