Perodical table
How many elements were know in the 19 century?
63
When was the first attempt to clasify the elements?
1789
Who a Group the elements according to their properties?
Antoine Lavoisier
Who established the concept of atomic weight?
Italian Stanislao Cannizaro
How many elements has the periodic table?
118
How many elements are naturally?
94
What is the name of the organization tha monitored the perodic table?
IUPAC
When was the last update of the perodical table?
December 1, 2018
Which was the first worked metal?
Cooper
What is the name called to the seven horizontal rows?
Periods
What is the name given to the 18 vertical columns?
Families or groups
How Mandy elements collected Antonie Lavoisier?
23
During the time of plato and aristotle which elements where discovered?
Air, fire, water and earth
Who arranches and ordered alphabetical the periodic table?
Jacob Berzelius
Who classified the elements into triads?
Johann Döbereiner
Where was the first international congress?
Karlsruhe,Germany
Who established the increasing order of atomic masses?
Julius Meyer
Who propose the law of the Octaves?
John Newlands
Who established that the ordering was according to the atomic number?
Henry Moseley
How many groups are in the periodic table?
18