I want to thank your team (Jeff) for finding a new writer when you were unable to reach my existing writer to revise my paper. I appreciate your professionalism and efforts. Thanks
The following timeline of the atomic model is highly condensed and omits many important contributions.
442 BC — Democritus/Leucippus — matter consists of indivisible particles.
1777 — Lavoisier — Law of Conservation of Mass
1803 — John Dalton — atomic theory of matter
1869 — Dmitri Mendeleev — Periodic Table and periodic law
1897 — J. J. Thomson — discovers electron
1898 — J. J. Thomson— plum pudding model of atom
1898 — Ernest Rutherford — discovers α and β rays
1900 — Frederick Soddy — discovers radioactive decay
1900 — Max Planck — quantum theory of energy
1905 — Albert Einstein — Quantization of light; ##E = mc^2##
1909 — Ernest Rutherford — nuclear model of atom
1913 — Niels Bohr — orbital model of atom
1914 — H. G. J. Moseley — measures atomic numbers of nuclei
1923 — Louis de Broglie — discovers wave/particle duality
1926 — Erwin Schrödinger — develops Schrödinger equation
1930 — Paul Dirac — proposes anti-particles
1932 — Carl Anderson — discovers positron
1932 — James Chadwick — discovers neutron
1955 — Segrè/Chamberlain — discover antiproton
1955 on — many new discoveries about subatomic particles
Show more
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.
Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.
Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.
Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.
Read more