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Democritus
Hypothesized atoms can not be destroyed, differ in size, shape and temperature, are always moving and are invisible. -
Jan 1, 1093
Henri Becquerel
Along with MArie and Pierre Curie he also had discovery with radioactvity.
he helped understanding of how dangerous radioactivity can actually be. -
Antoine Lavoisier
Law of Conservstion
Matter can not be created or destroyed -
MIchael Faraday
Contributed to electromagnetism and electrochemistry
Discovered electromagnetic induction, diamagnetism and electrolysis. -
Joseph Louis Proust
Law of Definite Proportions
a compound is composed of exact proportion of elements by mass regardless of how the compound was formed. -
John Dalton
Atomic Theory
all matter is made up of atoms -
Marie and Pierre Curie
They are best know for their discovery of radioactivity. They discovered the elements radium and polonium.
They were married and became invested in their discovery
Without this discovery we would not have known how dangerous an unstable atom could really be. -
J.J Thomson
Suggested a model of the atomas a sphere of postive matter in which electrons are positioned by electrostatic forces. -
Robert Milikan
He measured the charge of an electron using Milikan's oil-drop apparatus
-without it we would not know until much later that an elctrons charge was negative. -
Niels Bohr
An atom is a small positively charged nucleus surrounded by orbitting electrons.
We would never know that the nucleus was postively charged without this discovery -
Albert Einstein
Albert has done so many things for science but he impproved the fundamental statistical theory of heat
quantum of energy
LASER light amplification by stimulated emission of radiation. -
Louis DeBroglie
His ideas were the basis for the wave mechanics theory. realized electrons can act like particles and waves.
we ould not have the wave mechanics theory without Louis DeBroglie. -
James Chadwick
discovered the neutron
without the neutron discovery we would not know that the neutrons is paired with protons in the nucleus and that it is neutral. -
Max Planck
Originated the Quantum Theory
we use the Quantum Theory now in the 2014 without his discovery we would not understand the theory of matter. -
Ernest Rutherford
He postulated the nuclear structure of the atom.
gold foil experiment -
Otto Hahn
pioneer in radioactivity and radiochemistry. -
Lisa Meitner
discovered nuclear fission -
Glen T Seaborg
known for the discovery and investigation of ten transuranium elements
without him we would not know what they are. -
Erwin Schrodinger
He delveloped a number of fundamental results in the field of Quantum Theory. Also his thoughts became the basis or the wave mechanics theory.
we use the quantum theory and are taught about it in science classes without him and his intelligent thoughts we would not have the theorys and proof we have today. -
aristotle
He believed all substances were made out of fire, water, air and earth. Later he was proved wrong.
