Early History Of The Atom Homework Answers _HOT_

Early History Of The Atom Homework Answers

having discovered this, rutherford decided to investigate the chemistry of the atom. he was able to show that the positive charge of the nucleus was responsible for the chemical reactivity of the atom, and that it was also responsible for the chemical properties of the elements. he used an experiment to bombard a target with alpha particles, and was able to show that they were bounced back by the electrons, rather than passing through them. this proved that the positive charge of the nucleus was responsible for the repulsion of the electrons.

[] from the 1890s onwards, physicists developed theories to explain the atomic structure of matter. in 1897, chemist j j thomson suggested a model of an atom based on the tracks left by charged particles as they passed through a magnetic field. in 1905, the physicist j j thomson suggested that atoms were composed of tiny charged particles, the electrons, which orbit around a central nucleus, the proton. in 1911, he suggested that electrons are bound to the nucleus by negative electric forces, which he called the electron cloud. in the 1920s, the british physicist ernest rutherford proposed that atoms are mostly empty space. the electron cloud model was also used to explain chemical bonding. []

[] while these models were often used to explain chemical bonding, they were not the only models proposed during the early 20th century. in 1905, the physicist j j thomson suggested that atoms are composed of tiny charged particles, the electrons, which orbit around a central nucleus, the proton. in 1911, he suggested that electrons are bound to the nucleus by negative electric forces, which he called the electron cloud. in the 1920s, the british physicist ernest rutherford proposed that atoms are mostly empty space. []

[] the history of the atom theories and models. click to enlarge all matter is made up of atoms. this is something we now take as a given, and one of the things you learn right back at the beginning of high school or secondary school chemistry classes. despite this, our ideas about what an atom is are surprisingly recent: as little as one hundred years ago, scientists were still debating what exactly an atom looked like. this graphic takes a look at the key models proposed for the atom, and how they changed over time. though our graphic starts in the 1800s, the idea of atoms was around long before. []
this list can go on forever, but this is a good place to stop. we all know how important the discovery of the electron has been for the field of physics, and the discovery of the neutron and proton has been equally important. the periodic table is still the best way to organise the elements, and many people will claim that the models of the atom we currently have are still not perfect, even though they are basically the same as the ones we had for a hundred years. in fact, some of the major changes in the last hundred years have been to the theory of particle physics, and not in the field of chemistry, where we still use the old model to good effect.
in the next few weeks, we will be looking at the history of some of the key theories of the twentieth century, including quantum mechanics, relativity, and nuclear physics. i hope you are as excited as i am!
weve covered a lot in this post. i hope it was helpful. now, i will leave you to read the rest of this post where i will list some physics textbooks to explore the atomic model further. this week, i chose a book by richard feynman, the famous american physicist.
5ec8ef588b