Tjis essay explains the evolution of the atomic theory and how it has changed over the last cenutry or so.

The atomic scheme has changed much since John Daltons time. In the

late cardinal hundreds John Dalton first discover that elements combine

in specific proportions because they atomic number 18 do of individual atoms. For

example, hydrogen and chlorine always combine in a specific proportion to

create hydrochloric acid. Dalton thought that atoms were small particles,

like a small marble. Daltons atomic possible action consisted of three parts. They

were:

*All sum totals are made of atoms. Atoms are small particles that cannot

be created, divided, or destroyed.

*Atoms of the same substance are exactly alike, atoms of different atoms

are different.

*Atoms join with separate atoms of other substances to make sweet substances.

Daltons theory was proved wrong when new education was discovered

and Daltons theory could not explain it. The atomic theory has evolved.

In 1897, a scientist named J.J. Thompson found and identified a

problem in Daltons theory. He discovered that there were particles inside

the atom. So, Thompson said, atoms can be divided into even smaller parts.

The particles that were found inside the atom had a negative force. The

negatively super charged particles were called electrons. Scientists had already

found out that atoms had no overall charge. Thompson didnt know the

location of the dictatorially charged material so he made a theory that the

negatively charged electrons were embedded in the atom which was made

of overall positive matter. Thompsons model was called the plum-pudding

model. The electrons looked like plums that were in the pudding .

In 1909, a gay named Ernest Rutheford, a former(prenominal) student of

Thompson wishinged to investigate his former teachers theory. He aimed a

small beam of radium particles at a tag end of thin gold foil.



He thought if

atoms were only fragile blobs embedded with electrons like Thompson had

suggested then the beam of...

Your essay was decent; however, it left much to be desired. You could begin by decision common threads that strongly link the theories together, and providing some information on how the discovery was made along with scientific / numerical reasoning. In addition, your conclusion left the whole topic coarse; whereas, it should have summed up your essay, without leaving questions about the topic itself dangling there. Though it should produce a desire to learn much about the topic within the reader, it should not leave questions that do no merit (ie. how close are they to discovery?).

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