24
/
en
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
June 15, 2020
Create
Public Timelines
Library
FAQ
For education
Cabinet
For educational institutions
For teachers
For students/pupils
Download
Export
Duplicate
Embed
Edit
318 views
0
0
Jamiyah Polite & Anyliah Middleton
Time line
Created by
jamiyah
⟶ Updated 13 Oct 2017 ⟶
List of edits
Comments
Events
The atom scientists in the mid - 1920's , by the convinced that the Bohr atomic model was incorrect , formulated new and innovative explanation of how electron are arranged in atoms.
The english scientist Henry Moseley ( !887 - 1915 ) discovered that atoms of each element contain a unique positive charged
Each demonstrated a connection between atomic mass and the properties of elements .
Ernest Rutherford determines properties of the nucleus , including charge , relative size , and density . 1932 Scientist develop a particle
Who performed the famous gold foil experiment that helped define modern atomic structure , identified alpha , beta , and gamma radiation .
Ernest Rutherford showed in 1911 that the positive pudding was all crammed into a massive dense core , or nucleus , surrounded at a distance by the electron plums .
The english scientist Henry Moseley ( !887 - 1915 ) discovered that atoms of each element contain a unique positive charged
Each demonstrated a connection between atomic mass and the properties of elements .
Who performed the famous gold foil experiment that helped define modern atomic structure , identified alpha , beta , and gamma radiation .
Bohr ‘s role in the enterprise being in 1913 with a series of three papers that became the foundation for the future of atomic science .
Published a theory of atomic structures relating the electron arrangement in atoms and atomic chemical properties
Proved the existence of neutrons
A model of atomic structure Proposed by J . J. thomson
One of the first to use an analytical balance to monitor chemical reactions
One of the first to use an analytical balance to monitor chemical reactions
He was a school teacher in england
He studied chemical reaction and made observations and measurements on the way . He was able to determine the mass ratio of the elements involved in those reactions
believed that everything in the universe was made up of atoms
believed that everything in the universe was made up of atoms
He discovered electrons and Thomson is also credited with finding the first evidence for isotopes of a stable ( non-radioactive) element in 1913
Determined the charge of an electron using the oil dropping apparatus
Thomson showed that cathode rays were composed of previously unknown negatively charged particles, which he calculated must have bodies much smaller than atoms
He discovered electrons and Thomson is also credited with finding the first evidence for isotopes of a stable (non-radioactive) element in 1913
Determined the charge of an electron using the oil dropping apparatus
