Sodium Symbol Na

The chemical symbol Na identifies sodium. It is a two-letter element symbol with capital N and lowercase a, encoded as U+004E U+0061. Periodic tables, nutrition labels, laboratory reports, and formulas use that exact capitalization. In “NaCl,” Na names the sodium part of sodium chloride. “Na⁺” adds a positive ionic charge, while bare Na can identify the element in a table or formula context. A heading or nearby word such as sodium prevents the two letters from being mistaken for ordinary text. Do not change Na to NA. The all-capital form is not the IUPAC element symbol, and “N/A” means not applicable rather than sodium. Nitrogen uses N, so calling Na the nitrogen symbol is also incorrect. Charges, coefficients, and subscripts must be added in their proper positions without changing the base letters. For accessible educational text, read Na as “sodium” rather than relying on letter names alone. Copy both characters and verify that automatic capitalization or spreadsheet cleanup has not altered the lowercase a. Literal Na works in UTF-8 HTML; numeric forms include N a and N a. The scope of this page is the sodium element symbol. Compounds and the sodium ion use Na as part of larger notation and should be labeled accordingly. Recopy the sample “Accessible reading: sodium,” confirm the final text still contains U+004E U+0061, and check that the visible heading names Na. This final check protects Na Symbol from font substitution, accidental character loss, and intent drift.