Mississippi Science PHS.3

PHS.3 is a cluster heading. These are the individual standards under it.

• PHS.3.1

  Use contextual evidence to determine the organization of the periodic table, including metals, metalloids, and nonmetals; symbols; atomic number; atomic mass; c...

• PHS.3.2

  Using the periodic table and scientific methods, investigate the formation of compounds through ionic and covalent bonding.

• 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, ...

• PHS.3.4

  Use naming conventions to name common acids and common compounds used in classroom labs (e.g., sodium bicarbonate (baking soda), NaHCO3; hydrochloric acid, HCl;...

• PHS.3.5

  Use mathematical and computational analysis to determine the atomic mass of binary compounds.

01

What Students Need to Do

Use symbols, atomic numbers, masses, groups, and periods to find and classify elements. Predict when atoms transfer or share electrons. Write and name compound formulas and common lab acids, then calculate formula masses.

02

What Mastery Looks Like

Students explain why magnesium and oxygen form MgO but calcium and chlorine form CaCl2. They name Fe2O3 as iron(III) oxide and write CO2 from carbon dioxide. They identify HCl as hydrochloric acid and count each atom when calculating formula mass.

03

Common Misconceptions

Students may confuse atomic number with atomic mass or a group with a period. They may write CaCl instead of CaCl2 because they ignore ion charges. They may use prefixes for ionic compounds or forget to multiply atomic mass by a subscript.

04

How to Assess It

Exit ticket: Use a periodic table to write the formula for calcium bromide, explain its ionic bond, and calculate its formula mass.

1. 01

   Use colored counters to model electron transfer in NaCl and electron sharing in CO2, then record each formula.

2. 02

   Ask students: Would magnesium and oxygen share or transfer electrons? Defend your answer using their positions on the periodic table.

3. 03

   Give pairs cards with names and formulas, including iron(III) oxide and sulfuric acid, to match and check against a key.

4. 04

   Compare baking soda and vinegar labels, then write formulas for sodium bicarbonate and acetic acid using a reference sheet.

• PHS.2

  Students will demonstrate an understanding of both modern and historical theories of atomic structure.

• P.7.5C.4

  Predict the properties and interactions of elements using the periodic table (metals, non-metals, reactivity, and conductors).

• CHE.3

  Students will demonstrate an understanding of the periodic table as a systematic representation to predict properties of elements.

• P.7.5C

  Students will demonstrate an understanding of the proper use of the periodic table to predict and identify elemental properties and how elements interact.