Question

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What is the resulting formula unit when strontium (Sr) and phosphorus (P) bond?

Answer 1

The resulting formula would be Sr3P2

Answer 2

Answer: The chemical formula of the compound is
`Sr_3P_2`

Step-by-step explanation:

Strontium is the 38th element of the periodic table. The electronic configuration of this element is
`[Kr]5s^2`

This element will loose 2 electrons to attain stable electronic configuration to attain +2 oxidation state.

Phosphorus is the 15th element of the periodic table. The electronic configuration of this element is
`1s^22s^22p^63s^22p^3`

This element requires 3 electron to attain stable electronic configuration to attain -3 oxidation state.

So, by criss-cross method, the oxidation state of the ions are exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

Hence, the chemical formula of the compound is
`Sr_3P_2`