Elements
Compounds
Balancing
People
Vocabulary
100

H

Hydrogen

100

H2O

Water

100

H₂ + O₂ → H₂O

2H₂ + O₂ → 2H₂O

100

First woman to know a Nobel Prize

Marie Curie

100

What is chemistry?

The basic building blocks of all matter. 

200

Ag

Silver

200

NaCl

Sodium Chloride

200

Cl₂ + NaBr → NaCl + Br₂

Cl₂ + 2NaBr → 2NaCl + Br₂

200

Introduced the atomic theory into chemistry. 

John Dalton

200

Lavoisier, Dalton, Mendeleev

The fathers of modern chemistry

300

K

Potassium

300

CO2

Carbon Dioxide

300

Na + O₂ → Na₂O

4Na + O₂ → 2Na₂O

300

Created the periodic table of elements.

Dimitri Mendeleev

300

Mercury, Francium, Cesium, Gallium, and Rubidium

Liquid Medals

400

Sn

Tin

400

C6H12O6

Glucose

400

Al₂O₃ → Al + O₂

2Al₂O₃ → 4Al + 3O₂

400

Established the Law of Conservation of Mass. 

Antoine Lavoisier

400

A unit of energy

Joule

500

Fl

Flerovium

500

C2H6O

Ethanol

500

P₄ + O₂ → P₄O₁₀

P₄ + 5O₂ → P₄O₁₀

500

Created a Law that states that at constant temperature the volume of a given mass of a dry gas is inversely proportional to its pressure

Robert Boyle

500

Outermost electrons that are responsible for bonding

valence electrons

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