Development of Atomic Model Over Time

Date: Development 07 the atomic Model over time Addromic theory developed over time. screnfists who conforbuted to developing the atomic model were Dalfon, thomson ,Ruther ford, Bhor, + - + f + - + t - + + - - + - Palton Afomac model thomson atom model (1803) (1897) 4 RutherFord a tomic Hiels Bohr atom quarfum mechanic model model model (1910) (1913) (1ga6) Shine like the stars.

No Date: 5. quantum Mechanics Atomic theory (wernet Hersenberg and erwin schrodinger). the reason quantum mechanical theory was developed was to perfect Bohr's aromic theory. the theory of quantum mechanics was perfected by erwin schrodinger who was a perfected by return schrodinger who was a physicist From Austra and nobel priae winner In Physics In 1933. Development 09 modern atomic theory based on de Brogire's hypothesis. According to lours de Brogine, dualism applies to electrons, namely that electrons are not Just particies, but 9150 move Like waves and have trajectorros that are also waves. Shine like the stars.

No. : Date: 4) Bohr's Atomic theory (Nrels Rdhr) electrons schell AI energy x positive levels 2x charged Nucleus 3x After Rutherford's theory began to spread anD be used, scren firsts agreed that and be used, screntists agreed that and pe used, scratists agreed that an a tom consits of electron and an atomic nudeus. Bohr's atomic theory organated From the weaknesses of rutherford's a tomic fheory, this Weaknesses 18 that the electron trajectores presented by Tutherford are not yet perfect For explaining the structure of an atom because they are considered to be In conflict with maxwell's collessical electrodynamic theory. from the weakness, Bohr attempted to developand perfees RutherFond's atomic theory by Using futher Ford's nuclear afomic model and planck's quan fun theory and proposed an atomic theory which is currently known as in Bohr's Atomic theory

No Date 3) Rutherford's Atomic theory (Ernost RutherFord) Electron proton Heubror Hucleus RutherFord and hrs two assistants discovered the Atomic nucleu 5 In iglo the atomoc nucleus has a radios. the theory discovered by tuther Ford came from experiments on bombarding the atomic nucler of gold plates with alpha particles (a parficle wrsha mass four times the mass of a hydrogen atom and a positive charge twice 55 the charge of an electron). Thrs experiment called Gerger- Mareden

No. Date: 2) Theory Athom Thomson (sirjoseph thomss) - - 1) + + + - - + - - + + + - In its development, thomson corrected the Shor comings of dallon's previous afonic theory In 1897 thomson discovered negatively charged parficles called electrons. the content of thomson's afonic theory is a 040 ball or billiard ball confaining several negative particies or electrons. these colectrons WILL be spread across the ball Like rarsins on bread. thomson's aromic theory can be called the raisin bread theory. the stars.

No : Date 1) hears from palton (John pactor) Dallon's Atomic theory rs based on two laws, namely tavorsrer's law of the Law of conservation of mas 5 and proust's law of the law of permanent arrangement following are the characteristics of the paltonatom: a) Atoms as elementary Parfrcles b) Cannot be change c) Fixed weight fatrons In compounds d) Chemical Reactions as atom exchange e) single and Indivisible Atom Shine like the stars.

No Date CHEMISTRY & BrocheMistry At OM Atom is the smallest Unit of a Chemical element that retaints its identity and unique properties Atoms consist of three basic types of particles positively charged protons, neutral neutrons, and negatively charged electrons. The atomic structure is the basic unit of matter consising of an atomic nucleus and a doug of electrons with a negative charge and its surroundings. in the nucleus of every atom there is a Mixture. Development of afomic theory Figures in the development of a fomic theory had different thoughts. the following are the Figures in the development of atomic theory 1. theory Atom Dalton ( gohn dalfary 2. Theory Atom thomson (Sir Joseph John thomson 3. Theory Atom Ruther Ford (Ernest Rutherford 4. Teory Atom Bohr (Nices Bohr) 5. Theory Atom McCanica Kuantum Shine like the starts