Atomic Structure and Periodic Table 1.1

Name the Greek elements

Name the Greek elements

Earth, Wind, Fire, Water

Name real elements known to the ancients

Cu, Sn, Au, Ag, Hg, Fe, Pb, C, S

What was the first Alloy?

Bronze

How was the first alloy made?

Mix melted Cu and Sn

Who coined the term atom?

Democritus

What famous Irish scientist gave a definition of elements?

Robert Boyle

Who listened the elements known at the time and gave us the Law Of Conservation Of Mass?

Lavoisier

What is Electrolysis?

Chemical reaction caused by electric current passing through an electrolyte

Who invented electrolysis?

Davy

Name two elements discovered using electrolysis.

Na, Ca, Ba, Sr, Mg, K

Who produced the atomic theory?

Dalton

Give 4 of its postulates.

Atoms unique, Tiny indestructible, Indivisible, Distinct masses, Properties, React in small whole numbers, Reactions involve rearrangement

What did Dobereiner contribute to the development of the periodic table?

Triads, Groups of three, Elements of similar properties, Middle on intermediate

Give an example to illustrate Dobereiner’s observation.

Chlorine (CL), Greenish. Bromine(Br), Red. Iodine(I), Purple. 35.5, Gas. 80, Liquid. 127, Solid

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

Arranged by property, Left gaps

What was the contribution of Moseley?

Atomic number, Number of protons

State differences between the modern periodic table and Mendeleev’s

Modern; No gaps, Noble gases, By atomic number, Transition elements in a separate group, Man made elements

Iron extraction

Extracted from ores by smelting, heating one with charcoal, reduced the oxide to the metal

Iron extraction formula

2Fe2 O3+3C=4Fe+3CO2

Newlands

Law of octaves, arranged in order of atomic mass, properties repeat in every eight element