Sure, let's complete the table by determining the chemical formula of each element in its standard state, including the physical state symbol.
1. Iron: Iron is already given in the table, and its formula in the standard state is Fe(s).
2. Carbon: In its standard state, carbon exists as a solid. Therefore, its formula is C(s).
3. Hydrogen: In its standard state, hydrogen exists as a diatomic gas. Hence, its formula is H₂(g).
4. Argon: Argon is a noble gas and exists as a monatomic gas in its standard state. Thus, its formula is Ar(g).
Therefore, the completed table is as follows:
[tex]\[
\begin{tabular}{|c|c|}
\hline element & formula \\
\hline iron & Fe(s) \\
\hline carbon & C(s) \\
\hline hydrogen & H₂(g) \\
\hline argon & Ar(g) \\
\hline
\end{tabular}
\][/tex]
This gives the complete chemical formulas for the listed elements in their standard states.
