Identify the formula for the binary covalent compound, phosphorus pentabromide. a. pbr5 b. pbr5 c. 5pbr d. p5br

A.  PBr5

Explanation:

To write the formulas for a compound, first identify what the elements used are.

In phosphorus pentabromide, the elements are phosphorus and bromine (bromine => bromide in a compound name). Find these symbols on your periodic table.

Phosphorus = P

Bromine = Br

Write them one after the other:

PBr

Then, determine the number of each atom, which will be written as a subscript. The word penta is the greek prefix meaning 5. Since it's attached to "bromide", there are 5 bromine atoms.

PBr₅

b is the correct

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