The chemical formula for lithium phosphide is Li3P. Which best describes this ionic compound?

Lithium is a Group 1 element, so each lithium ion has a 1+ charge. In Li₃P, three lithium ions provide a total charge of 3+, which is balanced by one phosphorus ion with a 3− charge. Therefore, lithium ions have 1 positive charge and phosphorus ions have 3 negative charges.

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