How to describe the the yonic value and type of bond of this formula

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The discussion focuses on determining the type of bond in the compound PBr3, specifically whether it exhibits yonic, dipolar, or covalent characteristics. The participants emphasize the importance of electronegativity values, noting that bromine (Br) has an electronegativity of 2.8 and phosphorus (P) has a value of 2.1. By subtracting these values, it can be inferred that the bond is likely covalent due to the relatively small difference in electronegativity. The conversation highlights the need for understanding bond types based on electronegativity differences and molecular structure. Ultimately, PBr3 is identified as having covalent bonds.
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Br=2.8
P=2.1

i know that we should subtract them
but my formula is:
PBr_3

and how to know if its a yonic bond dipolar bond or covalent bond
??
 
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