people in chemistry

chapter 1,2,3

100

J.J. thompson 

discovered that electrons are negatively charged and have a mass of 1/2000 of hydrogen.

200

joseph Louis Proust

Discovered that a Compound always contains the same elements in the same proportions by Mass

300

Antoine Laurent Lavoisier ( father of modern chemistry)

Discovered the Law of conservation of mass, witch sates there is no detectible change in an ordinary chemical reaction

400

John Dalton 

discovered Dalton's atomic theory, 1. an element is composed of tiny particles called atoms. 2. in an ordinary chemical reaction atoms move from one substance to another, but no atom of any element into an atom of another element.3. Compounds are Formed when atoms of two or more elements combine.

500

Rutherford

discovered that 

1. matter is mostly empty space

 2. mass of the atom is concentrated in a small dense Nucleus 

3. nucleus is positively charged 4. Electrons are "about" the Nucleus.

chapter 1,2,3

100

Joseph Priestly

 Discovery of oxygen (O2) and nine other gases, including carbon monoxide (CO), nitric oxide (NO), nitrous oxide (N2O), ammonia (NH3), sulphur dioxide (SO2), and nitrogen peroxide (N2O4) Discovery of the carbon cycle 

200

James Chadwick 

the size of a Nucleus in a atom 

300

Amedeo Avogadro 

First scientist to distinguish between atoms and molecules.

equal volumes of gases at the same temp. and pressure contain equal Number of molecules. 

400

Max Planck

studided black body radiation and proposed the frequencies of vibration of the atoms/molecules were quantixed,  E=hv

500

Louis de Broglie

Wave nature of the electron

Chapter 5

100

Torricelli

invented of barometer 

200

Lavoisier, Cavendish, priestly : 

air is primarily nitrogen and oxygen with trace components of argon, carbon dioxide, water vapor 

300

Dalton

Dalton's law of partial pressures witch states that the total pressure of a gas mixture is the sum of of the gasses in the mixtures

400

Neils Bohr

quantum constant n = 1, 2 ,3

500

Erwin Schrodinger

Quantum Mechanical model of Hydrogen atom

chapter 6

100

G.N Lewis

Lewis structures

200

Wolfgang Ernst Paul

created the Pauli exclusion principle

300

Davisson and Germer of Bell
Telephone Labs

demonstrated that electrons can
indeed be diffracted.

400

Friedrich Hund,

predicted that

when several orbitals of equal energy are

available, electrons enter singly with parallel

spins until all the orbitals have one electron

each before electron pairing occurs.

500

N. V. Sidgwick and H.
M. Powell  

developed of VSEPR