TERM 1
Animation 1st
DEFINITION 1
Democritus was a Greek Philosopher that w as born in Abdera, Greece in 460 BC.
He is known for his work on the utmost de velopment of the atom and the
development of the first atomic model. He was one of the first scientists to make
an impact in the world that was in 460 Bc. A nd possibly died in 370 BC.During 400
BC, Greek Scientist Democritus came up w ith the first atomic model. He thought
if a physical object like an Evergreen Tree got smaller and smaller the object
would be smaller. This meant that when yo u keep breaking down an atom, it
would reach to a size that the human eye c ant damage or see it. This model
allowed us to observe how one perspective of the model interested people before
advancements in this model.
TERM 2
2nd
DEFINITION 2
John Dalton was a meteorologist and physicis t born on September 5th 1766 in
Eaglesfield, England. Dalton is known create his own law that reflected to the
particles present in a atom, and changing ho w the atomic model was perceived
from Democritus Model. Dalton helps establi sh how his law helped establish how
particles could change a atom depending on the number of protons and electrons
present. John Dalton died on July 27 1844 in Manchester, England with a
important law established in the process.Afte r Democritus created the first
model, John Dalton created his own input in to the atomic model. Dalton said that
atoms can break into various elements and c an contain compounds that can two
or more elements. From Daltons idea it con tained similar ideas as Democritus.
However, he expanded on that they could c ontain various masses in an atomic
model and created a new idea on the mode l.
TERM 3
3rd
DEFINITION 3
J.J Thomson was a English physicist that was born in Manchester, England on
December 18 1856. Thomson was known for his work in establishing the atomic
structure and the discovery of the electron. T hat led him to winning a Nobel Prize
for his discovery. Thomson helped establish how the importance of the atom
structure and how electrons would affect late r people in life. J.J. Thomson died
August 30, 1940 in Cambridge, England wit h important discoveries that helped
people understand atoms clearly.J.J Thomson atomic model consisted of the plum
pudding model. That consisted of how the p articles in a atom were present just
like if you were eating a plum pudding. This showed if there was more particles it
would be like if the pudding was more den se than before.
TERM 4
4th
DEFINITION 4
Lord Rutherford was born on August 30th , 1871 in Spring Grove, New
Zealand. Rutherford was known for his w ork on the discovery of the
atom. Rutherford helped establish how ato ms can change its mass when
it is affected by a charged nucleus. Lord R utherford died on October 19th,
1937 in Cambridge, England and affecte d how atoms can be affected by
how a nucleus is charged.Lord Rutherford s Model consisted of when
particles are emitted to the nucleus and af fects its direction around the
particle depending on the protons and elec trons. This established hoe
particles can affect a nucleus depending o n the charge present.
TERM 5
5th
DEFINITION 5
Niels Bohr was a Danish Physicist that was born on October 7th, 1885 in
Copenhagen, Denmark. Bohr is known fo r his proposition of a model that
saw electrons been affected when it mov es around the nucleus in a
particular motion. Bohrs proposition helped people in the world
understand how electrons can affect a nu cleus when it moves in a
particular way. Niels Bohr died on Novemb er 18th, 1962, in Copenhagen,
Denmark with an important proposition tha t influenced how the atom is
perceived.Niels Bohrs model consisted of a n atom that had electrons that
would move in a circular orbit. And how it w ould be affected if other
elements were involved in the process.
