Interactive tools and printable resources for the chemistry classroom
Find the repeating patterns in real data for atomic radius, ionization energy, and electronegativity.
Explain and predict ionization energy and electronegativity trends using the pull of the nucleus.
Use periodic trends to explain reactivity and solve three mystery-element cases.
Lab with digital support: observe metals in water and acid, then explain the reactivity trend at the atomic level.
A narrated 2-minute recap of atomic radius, ionization energy, electronegativity, and reactivity.
Periodic Table Trends Escape Room
Why atoms bond: the octet rule, gaining, losing, and sharing electrons, and ionic vs. covalent bonds.
A narrated video on why atoms bond: the octet rule, gaining, losing, and sharing electrons, and ionic vs. covalent bonds.
Use electronegativity difference to predict nonpolar covalent, polar covalent, and ionic bonds.
A narrated video: how electronegativity difference sorts bonds into nonpolar covalent, polar covalent, and ionic.
Model electron transfer from metals to nonmetals and use it to find the formula of an ionic compound.
A narrated video: why magnesium chloride is MgCl₂, using electron transfer, ion ratios, and the crystal lattice.
Write formulas for binary ionic compounds by balancing charges, and check the criss-cross shortcut.
A narrated video: find the charges, balance them, and check the criss-cross shortcut.
Name binary ionic compounds with IUPAC rules, and write the formula from the name.
A narrated video: the positive ion keeps its name, the negative ion takes -ide, no prefixes, and back from a name to a formula.
Write and name compounds that contain polyatomic ions, using the parentheses rule.
A narrated video: ions made of several atoms, the -ate/-ite pattern, and when a formula needs parentheses.
Name and write formulas for compounds with metals that can have more than one charge, using Roman numerals.
A narrated video: finding a metal's charge from the formula and naming it with a Roman numeral.
Name molecular compounds with prefixes, and write their formulas from names.
A narrated video: naming molecules with prefixes, never mono first, and never reducing the formula.
Use a three-question decision tree to pick the right naming rules for any compound, then name it.
A narrated video: a three-question decision tree for choosing the right naming rules for any compound.
A narrated review of C7.04–C7.09: writing ionic formulas, naming ionic compounds, polyatomic ions, Roman numerals, molecular prefixes, and the decision tree, with pause-and-try problems.
One-page study sheet: the octet rule, gaining, losing, and sharing electrons, ionic vs. covalent bonds, and the ΔEN scale with worked examples.
Count valence electrons, then draw Lewis structures with single, double, and triple bonds in the Lewis Builder.
A narrated video: dots to lines, the six-step method, water step by step, and how carbon dioxide shares more to make double bonds.
Count electron domains, then predict linear, trigonal planar, tetrahedral, trigonal pyramidal and bent shapes in the 3D Shape Explorer.