HISTORY OF CHEMISTRY

They had proposed that all matter was composed of four fundamental substances fure earth water and air

who used the term atomos which later became atoms alchemy was reffered to as a pseudoscience

I believed that the earth is spherical in shape and rotated an axis once a day

Discovered the laws concerning pulleys, levers and of floating bodies which in turn gave rise to the concepts of density and specific gravity

Developement of systematic metallurgy(extraction of metals) by a german

Held that the elements fire water air and earth were building blocks

Recognized that most ordinary material things are composed of multiple substances

Whose main work was devoted to describing gaseous behavior and in many respects anticipated

Medicinal application of minerals by a suriss alchemist/ physician

Carefully measured the relationship between the pressure and volume of air

published his book the Skeptical

He published first modern chemistry textbook, elementary treatise in chemistry

The principle of the constant composition compounds

An english school teacher thouth about atoms as the particles that might compose

When 2 elements form a series of compounds, the ratios of mass of second element that combine

Suggested that the substance he called “phylogiston” burning materials

And english clergyman and scientist discovered oxygen

Showed that a given compound always contains exactly the same proportion elements by mass

Describe different forms of periodic table

Discoverd radio activity and another area of study

studies subatomic particles spectra and electricity

Modified by the quantom mechanics

Father of modern science

Discovered radio active

Father of chemistry

The first process definition of chemical element, reaction of chemical analysis

He discovered the Hydrogen gas which he termed “inflammable air”

Found out that water was composed of two gases hydrogen and oxygen

Known as the discovery of modern atomic theory

Proposed that atoms are mostly empty with a positively Charged nucleus

He researched methods of producing alternative fuels

Developed innovations in drug treatments against diseases caused by mosquitoes and agricultural soil

Built the first radio isotopes

The father of nuclear medicine

Best known for his achievements in industrial boitechnology and applied physical chemistry

Specialized in environmental chemistry

taught one of the first environmental chemistry courses