Mississippi Science CHE.5.3
The Standard
- CHE.5
- Students will investigate and understand the accepted nomenclature used to identify the name and chemical formulas of compounds.
Generate names of ionic and covalent compounds from their formulas. Name binary compounds, binary acids, stock compounds, ternary compounds, and ternary acids.
2026 Mississippi College- and Career-Readiness Standards for Science · Naming Compounds
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students read a formula and decide whether it names an ionic compound, a covalent compound, or an acid. They use ion charges for Roman numerals, number prefixes for covalent compounds, and the right endings for acids. They recognize polyatomic ions in formulas with three elements.
What Mastery Looks Like
- A student names FeCl3 iron(III) chloride and CO2 carbon dioxide without mixing Roman numerals and prefixes. They also name CaCO3 calcium carbonate, HCl(aq) hydrochloric acid, and H2SO4 sulfuric acid.
Common Misconceptions
- Students add prefixes to ionic names or leave out the Roman numeral for a metal with more than one charge. They call HCl(g) hydrochloric acid or name H2SO4 sulfurous acid after confusing sulfate with sulfite.
How to Assess It
- Exit ticket: Name FeCl3, CO2, CaCO3, HCl(aq), and H2SO4. Circle the formula that needs a Roman numeral.
Lesson moves
Ways to Teach It
Give pairs FeCl3 and CaCO3 formula cards plus ion cards; have them match the ions, then write each compound's name.
Ask students: Why is HCl(aq) hydrochloric acid but HCl(g) hydrogen chloride? Have them write one sentence about what (aq) changes.
Play a naming relay with cards for CO2, FeCl3, NaNO2, HNO2, and HNO3; students write each name before passing the card.
Show an antacid label listing calcium carbonate; give students CaCO3 and ask them to name it before checking the label.
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Related Standards
- CHE.5
Students will investigate and understand the accepted nomenclature used to identify the name and chemical formulas of compounds.
- CHE.5.1
Use the periodic table and a list of common polyatomic ions as a model to derive chemical compound formulas from compound names and compound names from chemical...
- CHE.5.2
Generate formulas of ionic and covalent compounds from compound names. Discuss compounds in everyday life and compile lists and uses of these chemicals.
- PHS.3.3
Using naming conventions for binary compounds, write the compound name from the formula, and write balanced formulas from the name (e.g., carbon dioxide - CO2, ...
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