What Does (I) Stand for After a Chemical Compound?

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SUMMARY

The notation (I) after a chemical compound typically indicates the oxidation state of an element, as seen in Copper(I) Iodide, where it specifies the +1 charge of the copper atom. In contrast, the notation (l) denotes that a substance, such as H2SO4, is in a pure liquid state. The four standard states of matter in chemical notation are (g) for gas, (l) for liquid, (s) for solid, and (aq) for aqueous solutions. Understanding these notations is crucial for accurately interpreting chemical formulas and their properties.

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I was wondering what (I) means when it is written after a chemical compound, for example, H2SO4 (I). Thanks!
 
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It's not an I, it's an L, and indicates that the Hydrogen Sulfate is in a pure liquid state.

It couldn't be an I, as the four states are (g), (l), (s), and (aq).

Now, there is a case where (I) is used in a compound, such as Copper(I) Iodide, and that indicates the charge of the copper atom.
 

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