The past to present summary of elements

The begining of the element.

400

Democrites stated that everthing is composed of "atoms" and which are physically and geometrically indivisble.

History outline of atoms.

Period: 400 to Oct 16, 2012

Rebellence

410

He disobelived the ancient greek theory of how atoms are geometrically the same size and their constant motion.

the father of chemistry

Oct 18, 1630

Robert Boyle Identified that 2 substances thats can be break down or more is not an element.

Motion of the universe.

Oct 18, 1704

Sir isaac newton chacterized the functional universe with small soild masses in motion.

Conversation of mass

Oct 18, 1730

Laviosier create the principle of mass stats that when the conservation of energy is inclosed in a system on tranformation will happen overtime.

Delvolpment

Oct 18, 1750

William crookes found the fundmental delvopment for atomic physics.

Atomic theory

Oct 1, 1800

John dalton found the 5 theorys for atoms Matter is made up of indivisible atoms.
All atoms of an element are identical.
Atoms are neither created nor destroyed.
Atoms of different elements have different weights and chemical properties.
Atoms of different elements combine in simple whole numbers to form compounds.

Electric charged

Oct 20, 1830

Michael faraday found that anything that glows is electrically charged.

Delvolpment of atomic structure.

Oct 16, 1897

Found the atomic mass and the electron also discovered that the charge to mass ratio depended on filling gas in the tube.

Mass of electron

Oct 16, 1910

Found the calculation of the mass of the electron and the positively charged atom.

Investigating radioactive elements.

Oct 18, 1910

Harriet Brooks investigated radioactive elements.

Center of an atom

Oct 16, 1920

Rutherford proposed that all of the positive charge and all of the mass of the atom occupied a small volume at the center of the atom and that most of the volume of the atom was empty space occupied by the electrons.

Invention

Oct 16, 1930

invented the mass spectrograph in 1920. And observed that there were 3 types of hydrogen atoms.

Saturnian

Oct 18, 1935

Hantario nagaoka was the first scientist to present the first saturnian atom model.

Discover of the neutron.

Oct 16, 1974

James chadwick discover the neutron and interestingly led to the atomic bomb.