Rules for writing correct chemical formulas: 1. Use Correct Spelling Always double-check spelling — chemical names must be exact. ✅ Sodium chloride ❌ Sodium cloride or Sodum chloride 2. Capitalize Properly Capitalize only the first letter of the name (or proper nouns like elements). ✅ Magnesium oxide ❌ magnesium Oxide, MAGNESIUM OXIDE Note: If the test system is case-insensitive, it may not penalize this — but it’s safest to follow standard capitalization. 3. Use Spaces, Not Dashes or Underscores Separate words with spaces: ✅ Iron(III) sulfate ❌ Iron-III-sulfate, Iron_III_sulfate Provide the name for the following: Co(ClO)2 N2O HNO2 Ba(CN)2

Rules for writing correct chemical formulas: 1. Use Correct Element Symbols Always capitalize the first letter and lowercase the second (if present). ✅ H2O (Water) ❌ h2o, H2o, or H2O 2. Type Subscripts as Regular Numbers Use regular numbers immediately after the element symbol. ✅ CO2 (Carbon dioxide) ✅ C6H12O6 (Glucose) ❌ CO₂ (avoid using Unicode subscript characters) 3. Include Parentheses for Grouped Atoms Use parentheses when indicating multiples of a group. ✅ Ca(OH)2 (Calcium hydroxide) ✅ Al2(SO4)3 (Aluminum sulfate) 4. No Spaces Between Elements Keep element symbols and numbers together without spaces. ✅ H2SO4 ❌ H2 SO4 Provide the formula for the following: sodium carbonate chromic acid disulfur tetroxide chromium (III) carbonate

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