1.1 Development of periodic table

What r the Greek elements

Wind earth fire water

5 real elements known to the ancients

Carbon, iron , silver , gold ,sulfer

What’s the first alloy and how was it made

Bronze, mix melted copper and tin

Who coined the term atom

Democritus

What famous Irish scientist gave a definition of elements

Boyle

Who listed the known elements at the time and gave us the law of conservation of mass

Lavoisier

What is electrolysis and who invented it

Chemical reaction caused by electric current and Davy

Name 2 elements discovered using electrolysis

Na, k

Who produced the atom theory

Dalton

Give four of its postulates

distinct properties, tiny indestructible, atoms unique, distinct mass

What did dobereiner contribute to the development of the periodic table

Triads groups of three of elements with similar properties

Give an example to illustrate his observations

Cl, br, I , Green, red, purple , gas liquid solid

What did Mendeleev do in his periodic table that had not been done before

Arranged by property and left gaps

What was the contribution of Mosley

Atomic number

State three differences between modern periodic table and mendeleeev’s

No gaps, noble gases, man made elements