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EXCELLENCE
Excellence School
EXCELLENCE SCHOOL

Chemistry, Explained

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LEVEL 1 · 0/3LEVEL 2 · 0/3LEVEL 3 · 0/3LEVEL 4 · 0/3LEVEL 5 · 0/3START
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Chemistry you can touch: the atom's three particles, atomic number and isotopes, element symbols and the Latin five, a full periodic table you tap (periods, groups, families, metals and nonmetals, Mendeleev's predictions), ionic and covalent bonds, molecules you turn in 3D (why water is bent at 104.5°), balancing equations, states of matter and mixtures, and the pH scale.

3h 03m5 constellations
AT THE SUMMIT, YOU WILL BE ABLE TO

01Explain what an atom is made of

02Find any element on the periodic table and name its family

03Tell ionic from covalent bonds

04Predict a small molecule's shape

05Balance a simple equation and read pH

Every lesson of Chemistry, Explained

15 lessons in 5 levels, about 3 hours. Level 1 is free.

Level 1Inside the AtomFree · 3 lessons
  1. Protons, Neutrons, ElectronsKnow what an atom is made of, and where its mass and its space are.12 min
  2. Atomic Number and IsotopesRead an element's identity from its protons, and its isotopes from its neutrons.12 min
  3. Element SymbolsRead element symbols, including the ones that come from Latin.12 min
Level 2The Periodic TableMembership · 3 lessons
  1. Rows and ColumnsRead the table's periods and groups, and why Mendeleev's version mattered.12 min
  2. Families: Alkali Metals to Noble GasesName the table's families and find their members.12 min
  3. Metals, Nonmetals, MetalloidsSort elements into metals, nonmetals and metalloids by where they sit and how they behave.12 min
Level 3Bonds and ShapesMembership · 3 lessons
  1. Ionic Bonds: SaltSee how atoms that give and take electrons hold together as a salt.12 min
  2. Covalent Bonds: SharingSee how nonmetals share electrons, in single, double and triple bonds.12 min
  3. Molecules in 3DSee why water is bent, carbon dioxide straight and methane a pyramid.13 min
Level 4Reactions and MatterMembership · 3 lessons
  1. Balancing EquationsRead a chemical equation and balance it, atom by atom.12 min
  2. Matter: States and MixturesTell solids, liquids and gases apart, and elements from compounds and mixtures.12 min
  3. Acids, Bases and pHRead the pH scale and what one step on it means.12 min
Level 5Chemistry Around YouMembership · 3 lessons
  1. A Tour of the TableFind any element fast by its family, period and story.12 min
  2. Molecules You Breathe and DrinkName the atoms in the molecules around you, and their shapes.12 min
  3. The Chemistry TestUse atoms, the table, bonds, shapes, equations and pH together.14 min
FREE

Level 1 is open.

Membership opens every other level of this path.

See membership
AFTER THE CORE

Keep going where this path leads.

Think Like a ScientistHow chemistry knows what it knows · 2h 59m
Understand Climate ChangeCarbon dioxide at planet scale · 2h 54m