https://padlet.com/mineergene_me/6lv6zd8bgmq Post your presentation topics. ENJOY IT! en-us 2019-04-18 10:18:04 UTC 2023-03-28 16:59:17 UTC hello@padlet.com https://padlet.net/icons/png/1f331.png mineergene_me https://padlet.com/mineergene_me/6lv6zd8bgmq/wish/354744533 Post your presentation topics which related with Atom Models which are:
-Thomson
-Rutherford
-Bohr
-Dalton
(at 9^th grade level). Here is what you will do:

1.Each student will choose different model. 
2.Each student will post their topics with brief explanation]]> 2019-04-28 07:48:32 UTC https://padlet.com/mineergene_me/6lv6zd8bgmq/wish/354744533 alky_meltem https://padlet.com/mineergene_me/6lv6zd8bgmq/wish/354925241 Diagram of physicist Ernest Rutherford's gold-foil experiment. In 1909 Rutherford disproved Sir J.J. Thomson's model of the atom as a uniformly distributed substance. Because only very few of the alpha particles in his beam were scattered by large angles after striking the gold foil while most passed completely through, Rutherford knew that the gold atom's mass must be concentrated in a tiny dense nucleus.]]> 2019-04-29 08:49:15 UTC https://padlet.com/mineergene_me/6lv6zd8bgmq/wish/354925241 alky_meltem https://padlet.com/mineergene_me/6lv6zd8bgmq/wish/354926187 On the basis of the observations made during the experiment, Rutherford concluded that;
-Major space in an atom is empty – A large fraction of α-particles passed through the gold sheet without getting deflected. Therefore, the major part of an atom must be empty.The positive charge in an atom is not distributed uniformly and it is concentrated in a very small volume.
– Few α-particles when bombarded were deflected by the gold sheet. They were deflected minutely and at very small angles. Therefore he made the above conclusion.Very few α-particles had deflected at large angles or deflected back. Moreover, very few particles had deflected at 180o. Therefore, he concluded that the positively charged particles covered a small volume of an atom in comparison to the total volume of an atom.]]> 2019-04-29 08:53:30 UTC https://padlet.com/mineergene_me/6lv6zd8bgmq/wish/354926187