https://padlet.com/3700151/4t8qftalzo9s en-us 2019-02-05 13:49:15 UTC 2019-02-05 15:06:47 UTC hello@padlet.com 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327760015 A strong, penetrating radiation was emitted when scientists Herbert Becker and Walter Bothe directed helium nuclei at beryllium in 1930. Many thought that this was high-energy electromagnetic radiation, but Chadwick was awarded the Nobel prize for proving that it consisted of a neutral particle, or a "neutron."]]> 2019-02-05 13:56:29 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327760015 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327763343 In 1911, Marie Curie was awarded a Nobel prize in an advancement in Chemistry for her discovery of elements Radium and Polonium, by studying the nature of and isolating Radium.]]> 2019-02-05 14:01:47 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327763343 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327768372 Ernest Rutherford was awarded the Nobel Prize 1908 for his investigations in the chemistry of radioactive substances and the disintegration of elements.]]> 2019-02-05 14:10:22 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327768372 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327770397 In the 1890s, J.J. Thomson estimated the magnitude of a tiny particle related to the atom through experiments with charged particles, that was previously introduced as a transmitter of electricity. In 1897, he illustrated how cathode rays consist of particles, or electrons, that conduct electricity. Also, he concluded that these electrons are part of atoms.

]]> 2019-02-05 14:13:43 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327770397 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327779690 - Different elements (kind of atoms) have different weights

- Atoms can't be created or destroyed

- Atoms form molecules in specific ratios

- All atoms of the same element have the same size and weight

- Atoms of different elements have different sizes and weights

- Published book on theory in 180]]> 2019-02-05 14:28:36 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327779690 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327779815 - Everything is made of atoms

- Atoms are the smallest indivisible units of matter (too small to see)

- Atoms have different shapes and sizes, so they have different properties

- Atoms are constantly in motion, are solid, and can't be destroyed

- Lived 460 BC to 370 BC]]> 2019-02-05 14:28:47 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327779815 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327779862 - Theorized electrons existed in "energy levels"

- Electrons jump up a level when atom receives energy

- Fall down a level when atom loses energy

- Received Nobel Prize in 1922]]> 2019-02-05 14:28:52 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327779862 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327794608 2019-02-05 14:49:03 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327794608 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327795698 2019-02-05 14:50:18 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327795698 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327799698 2019-02-05 14:55:13 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327799698 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327800645 2019-02-05 14:56:29 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327800645 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327801928 2019-02-05 14:58:16 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327801928 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327803986 2019-02-05 15:00:54 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327803986 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327805136 2019-02-05 15:02:33 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327805136 3700151 https://padlet.com/3700151/4t8qftalzo9s/wish/327805452 2019-02-05 15:02:56 UTC https://padlet.com/3700151/4t8qftalzo9s/wish/327805452