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History
Names and Symbols
Structure
Composition
Your Reaction
100
2000 years
How long did Aristotle's theory of four elements last?
100
Xe
What is the symbol for xenon?
100
a molecule made of two atoms of the same element
What is a diatomic moluecule?
100
hydrogen and oxygen
What is in water?
100
hydrogen chloride
What forms when hydrogen and chlorine react?
200
John Dalton
Who proposed the first atomic model?
200
ammonia
What is NH3?
200
giant crystalline
What is the structure of diamond?
200
1:4
What is the ratio of carbon to hydrogen in methan?
200
iron sulphide
What is the product of iron and sulphur?
300
Democritus
Who introduced the term "atom"?
300
ClOCK
You can tell the time with chlorine, oxygen, carbon, and potassium
300
simple
What is water, a simple or giant molecule?
300
iron and sulphur
What is the composition of iron sulphide?
300
CO
What is the formula of carbon monoxide?