My exquisite padlet by Eirinn Madigan-King https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t en-us 2023-09-08 09:16:31 UTC 2023-09-29 11:41:05 UTC hello@padlet.com Dalton's Atomic Theory | Don't Memorise - YouTubeYouTubehttps://www.youtube.com › watch eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2690420128 John Dalton was born the 5th of September 1766 and died the 27th of July 1844. Colour blindness was known as Daltonism because of him. John Dalton also proposed the theory about the atom in 1808. He stated that all matter is made up of microscopic particles called atoms. All atoms are invisible, they can't be broken up into smaller or simpler particles.]]> 2023-09-08 09:24:51 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2690420128 1879 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2690421450 2023-09-08 09:25:35 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2690421450 1897 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705648279 2023-09-15 09:18:07 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705648279 1869 courtneycummins1 https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705654620 2023-09-15 09:23:50 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705654620 1817 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705655487 2023-09-15 09:24:34 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705655487 1864 courtneycummins1 https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705655521 2023-09-15 09:24:36 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705655521 1869 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705656519 2023-09-15 09:25:39 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705656519 1909 courtneycummins1 https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705656785 2023-09-15 09:25:52 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705656785 1932 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705656988 By bomburding a sample of berylium with alpha particles Chadwick brought about the release of neutral particles with same mass of the proton. He called the particle neutron.]]> 2023-09-15 09:26:02 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705656988 1913 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705657589 2023-09-15 09:26:38 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705657589 1913 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705657911 2023-09-15 09:26:58 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705657911 1662 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705658470 2023-09-15 09:27:32 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705658470 1815 eirinnmadiganking https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705658722 2023-09-15 09:27:50 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2705658722 Boyle discovered the relationship between pressure and volume in a gas that is now known as Boyle's law by using a vacuum chamber to change the pressure in a gas. He made careful observations and conducted a series of experiments to show that pressure and volume are inversely proportional to each other. https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725905716 2023-09-29 11:14:21 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725905716 In 1829 Johann Wolfgang Dobereiner discovered the existence of families of elements with similar chemical properties. Because there always seemed to be three elements in these families, he called them triads. https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725910197 2023-09-29 11:19:10 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725910197 In 1799 he experimented with nitrous oxide and was astonished at how it made him laugh, so he nicknamed it "laughing gas" and wrote about its potential anaesthetic properties in relieving pain during surgery. https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725912040 2023-09-29 11:21:23 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725912040 Newlands was the first to recognize that the elements fall into a pattern in which their properties repeat at regular intervals when they are listed in order of increasing atomic weight. He was also the first to assign atomic numbers to the elements. https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725912867 2023-09-29 11:22:21 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725912867 The discovery of radioactivity in 1896 led to a series of more in-depth investigations. In 1899 Ernest Rutherford demonstrated that there were at least two distinct types of radiation: alpha radiation and beta radiation. He discovered that radioactive preparations gave rise to the formation of gases. https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725916480 2023-09-29 11:26:46 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725916480 On 17 February 1869, Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table. https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725918479 2023-09-29 11:29:05 UTC https://padlet.com/eirinnmadiganking/x948jalez8tjqy1t/wish/2725918479 Crookes discovered a previously unknown element with a bright green emission line in its spectrum. He named the element thallium, from Greek θαλλός, thallós, meaning "a green shoot or twig". 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