Introduction to Nuclear Chemistry by Natasha Johnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw Early Theories and Models of the Atom en-us 2017-06-11 02:52:06 UTC 2024-05-03 12:30:30 UTC hello@padlet.com Early Theories of Matter nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975044 2017-06-11 03:05:55 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975044 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975185 2017-06-11 03:10:35 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975185 Who was Democritus? nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975200 Greek phliosopher(460 - 370 B.C.)
Question: What holds atoms together?
First person to propose the idea that matter was not infinitely divisible.
Matter was made of tiny individual particles called atoms.
Matter is composed of empty space through which atoms move.
Atoms are solid, homogeneous, indestructible, and indivisible.
Different kinds of atoms have different sizes and shapes.
Differing properties of matter are caused by size, shape, and movement of atoms.
Apparent changes in matter caused by changes in the grouping of atoms.]]> 2017-06-11 03:11:06 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975200 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975302 2017-06-11 03:17:23 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975302 Who was John Dalton? nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975315 (1766- 1844)
Revised Democritus’s ideas
Experiments verified his theory
All matter is composed of extremely small particles called atoms.
All atoms of a given element are identical, having the same size, mass, and chemical properties.
Atoms of a specific element are different from any other element.
Atoms cannot be created, divided into smaller pieces or destroyed.
In a reaction, atoms are separated, combined, or rearranged.
]]> 2017-06-11 03:18:07 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975315 Who was J.J. Thompson nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975342 (1856 – 1940)
Cathode Ray Tube experiments
Late 1890’s identified the first subatomic particle – the electron.
]]> 2017-06-11 03:20:13 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975342 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975368 2017-06-11 03:21:40 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975368 Who was Robert Millikan? nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975386 (1868 – 1953)
In 1909, determined the charge of an electron.
Calculated the mass of a single electron.
]]> 2017-06-11 03:22:44 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975386 Who was Ernest Rutherford nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975403 (1871– 1937)
In 1911, concluded that the atom contained a nucleus.
In 1919, discovered the next subatomic particle, the proton.
]]> 2017-06-11 03:24:14 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975403 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975425 2017-06-11 03:25:27 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975425 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975450 2017-06-11 03:26:41 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975450 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975480 2017-06-11 03:28:24 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975480 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975498 2017-06-11 03:29:10 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975498 Who was James Chadwick? nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975515 In 1932, discovered a 3rd subatomic partice, the neutron. ]]> 2017-06-11 03:29:57 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975515 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975527 2017-06-11 03:30:38 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975527 Models of the Atoms nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975536 2017-06-11 03:31:10 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975536 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975552 2017-06-11 03:32:19 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975552 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975568 2017-06-11 03:32:55 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975568 nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975585 2017-06-11 03:33:54 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975585 What is the difference between a nuclear reaction and a chemical one? nhillsmanjohnson https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975595 2017-06-11 03:34:16 UTC https://padlet.com/nhillsmanjohnson/dawqvlhce0iw/wish/175975595