CHALLENGE 01

The Periodic Table: 1 - 4

Place elements in the first four periods in their proper locations

CHALLENGE 02

Elements of Consequence

Explore elements present in real-world things

CHALLENGE 03

Classifying Elements

Classify chemical elements as metals, nonmetals or metalloids

CHALLENGE 04

Ionic & Covalent Compounds

Classify chemical compounds as ionic or covalent based on their formulas

CHALLENGE 05

Monatomic Ions

Identify the charges on common monatomic ions

CHALLENGE 06

Polyatomic Ions

Match polyatomic ion formulas with their names

CHALLENGE 07

Ionic Compound Formulas

Match polyatomic ion formulas with their names

CHALLENGE 08

The Salts Within Us

Match polyatomic ion formulas with their names

CHALLENGE 09

Compound Naming

Name chemical compounds or identify formulas from names

CHALLENGE 10

Visualizing Dissolution

View videos and animations of compounds dissolving

CHALLENGE 11

Visual Ionic Compound Solubility

View videos and animations of compounds dissolving

CHALLENGE 12

Text-Only Ionic Compound Solubility

Determine whether ionic compounds are soluble or insoluble in water

CHALLENGE 13

Visualizing Acid-Base Reactions

Determine whether ionic compounds are soluble or insoluble in water

CHALLENGE 14

Classifying Electrolytes

Classify soluble compounds as strong, weak, or nonelectrolytes

CHALLENGE 15

Compound Stoichiometry

Determine moles of a product that can be formed from the amount of moles of a reacant

CHALLENGE 16

Stoichiometry Problem Solving

Map the path to solving problems and choose conversion factors to get you through it

CHALLENGE 17

Hydration Number Experiment

Determine the hdyration number of a hydrated compound by watching a video of an experiment, making observations and calculating the results

CHALLENGE 18

Limiting Reactants

Calculate which reactant limits a chemical reaction based on given moles

CHALLENGE 19

Formal Charge

Calculate which reactant limits a chemical reaction based on given moles

CHALLENGE 20

Molecular Structure

Identify molecular structures, electron geometries, and Lewis structures across 5 levels

CHALLENGE 21

Hybridization

Determine the hybridization of central atoms in molecules

CHALLENGE 22

Polarity

Determine the polarity of molecules

CHALLENGE 23

Intermolecular Forces

Determine the intermolecular forces experienced by molecules

CHALLENGE 24

Properties of Liquids

Use IMFs to rank properties of liquids

CHALLENGE 25

Molecular Solubility

Predict whether molecular compounds are soluble in water

CHALLENGE 26

Graphical Rate Law Determination

Determine the rate law for a reaction using concentration-time plots

CHALLENGE 27

Equilibrium

Explore how the equilibrium constant K governs molecular populations

CHALLENGE 28

Identifying Acids and Bases

Identify the charges on common monatomic ions

CHALLENGE 29

Acid-Base Conjugate Pairs

Explore how the equilibrium constant K governs molecular populations

CHALLENGE 30

pH Practice

Explore how the equilibrium constant K governs molecular populations

CHALLENGE 31

Interpret pH Titration Curves

Recognize the type of pH titration from the pH plot

CHALLENGE 32

Acid-Base Speciation

Determine which acid-base state a system is in based on pH and pKa

CHALLENGE 33

Predicting Entropy Change

Predict the sign of entropy change based on a chemical reaction equation

CHALLENGE 34

Predicting Thermodynamic Favorability

Predict thermodynamic favorability based on enthalpy and entropy changes