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Dec 31, 2012 · Introduction to atomic theory ppt. Dec 31, 2012 • Download as PPTX, PDF •. 17 likes • 23,224 views. AI-enhanced description. Mariana Serrato. The document summarizes the development of atomic theory over thousands of years through the proposals of different atomic models by scientists like Democritus, Dalton, Thomson, Rutherford, Bohr ...
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In 1803,Dalton proposed an atomic theory. The theory stated that all elements were made of atoms and that the atoms were indivisible and indestructible particles. Dalton’s theory also said that atoms of the same element were the same, while atoms of different elements were different.
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Science Starter. • If you could see a single atom of gold (Au) and a single atom of lead (Pb), how do you think they would look different? What do you think they might have in common? Learning...
Jun 26, 2012 · Jun 26, 2012 • Download as PPSX, PDF •. 127 likes • 129,655 views. D. dankelly418. PowerPoint describing the basic structure of atoms. Geared toward Middle School science and technology classes. Technology Entertainment & Humor.
- Democritus' Atomic Theory
- Dalton's Atomic Theory
- Thomson's Atomic Model
- Rutherford's Atomic Model
- Modern Physics
Democritus thought that if you cut something in half again and again, you would at last have to stop. He said that this last piece of matter could not be cut any smaller. Democritus called these small pieces of matter atoms, which means "indivisible". He thought that atoms would last forever, never change and could not be destroyed. Democritus thou...
In 1803, the English scientist John Dalton, born in Cumberland, reworked Democritus' theory, as follows: 1. All matter is formed of atoms. 2. That atomsare indivisible and invisible particles. 3. That atoms of the same element are of the same type and mass. 4. The atoms that make chemical compounds are present in set proportions. 5. Chemical change...
In 1850, Sir William Crookes constructed a 'discharge tube', that is a glass tube with the air removed and metallic electrodes at its ends, connected to a high voltage source. When creating a vacuum in the tube, a light discharge can be seen that goes from the cathode (negatively-charged electrode) to the anode (positively-charged electrode). Crook...
In 1910, the New Zealand physicist Ernest Rutherford put forward the idea that the positive charges of the atom were found mostly in its center, in the nucleus, and the electrons (e-) around it. Rutherford showed this when he used an alpha radiation source (from helium) to hit the very thin gold sheets, surrounded by a Zinc sulphide lampshade that ...
Atoms are not elementary particles, because they are made of subatomic particles like protons and neutrons. Protons and neutrons are also not elementary particles because they are made up of even smaller particles called quarks joined together by other particles called gluons (because they "glue" the quarks together in the atom). Quarks areelementa...
PowerPoint Presentation - Atomic Theory. Atomic Theory & Atomic Structure. Early Atomic Theories. Democritis (400 BCE) •First to propose idea of atom. •Atom = “a”+ “tomos”= cannot be cut. •Based solely on logic; not supported by experiments. Democritus (c. 460 BC)
29 reviews. Subjects Science Properties and Changes of Materials. What will this PowerPoint teach my children? The tiny world of atoms is a fascinating subject to learn about. This atoms PowerPoint will be a great way to clearly and easily explain what atoms are, what they are made of and what mass is.
