https://padlet.com/frncsmanaois/4ewkbs1822f59bv3 Summary of topics I learnt in chemistry en-us 2022-09-13 07:57:26 UTC 2022-10-04 08:22:56 UTC hello@padlet.com https://padlet.net/icons/png/1f50e.png frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293847178 Dobereiner - Triads
Newlands - Octaves
Mendeleev - Periodic Law
Modern - The current Periodic Table]]> 2022-09-13 08:05:32 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293847178 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293848337 Ions - same amount of protons and electrons
Isotope - vast difference in amount of protons and neutrons]]> 2022-09-13 08:06:32 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293848337 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293853178 Other contributors to the Periodic Table

The Greeks - believed that there are 4 building blocks: Fire, Water, Earth, Air
Robert Boyle - discovered that elements' atoms could not be broken down with chemical means
Humphry Davy - discovered Sodium and Potassium
Henry Moseley - discovered atomic number with X-rays ]]> 2022-09-13 08:10:31 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293853178 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293855334 The spontaneous breakdown of unstable nuclei in an atom]]> 2022-09-13 08:12:22 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293855334 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293859242 Henri Becquerel - discovered radioactivity placing uranium salts on top of a photographic plate wrapped in black paper

Marie and Pierre Curie - coined the term "Radioactivity"]]> 2022-09-13 08:15:51 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293859242 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293860915 Particle decay is the spontaneous emission of unstable subatomic particles, transforming them into other particles]]> 2022-09-13 08:17:19 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293860915 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293863957 Alpha Decay - the ejection of subatomic particles similar to helium
Beta Decay - the ejection of a single electron
Gamma Decay - the emission of gamma rays]]> 2022-09-13 08:20:09 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293863957 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293865682 https://www.youtube.com/watch?v=koAFBScR41A&vl=en]]> 2022-09-13 08:21:32 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293865682 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293869203 https://www.youtube.com/watch?v=bptQMu7utWY&t=10s]]> 2022-09-13 08:24:25 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293869203 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293876145 2022-09-13 08:30:00 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293876145 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293878061 Cations - positively charged ions
Anions - negatively charged ions]]> 2022-09-13 08:31:39 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293878061 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293888410 The amount of time it takes for one-half of a radioactive isotope to decay]]> 2022-09-13 08:39:24 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293888410 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293894176 The Periodic Table is a display of all known & barely known elements. It is arranged by atomic number (amount of protons in an atom), and is a further developed version of Dmitri Mendeleev's periodic table.]]> 2022-09-13 08:44:13 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293894176 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293897844 2022-09-13 08:46:19 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2293897844 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2325221821 Democritus - he believed that matter is composed of particles, and that particles are so small that they are indivisible.
John Dalton - believed that all matter is made up of atoms and that these atoms cannot be broken down into simpler particles.]]> 2022-10-04 08:00:08 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2325221821 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2325223343 William Crookes - discovered cathode rays with an experiment using vacuum tubes.
JJ Thomson - discovered electrons and its mass-to-charge ratio by using cathode rays.
GJ Stoney - named the electron before it was discovered.
Millikan - discovered the size of the charge of the electron]]> 2022-10-04 08:01:32 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2325223343 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2325240743 Rutherford - by firing alpha particles at a gold foil, he discovered the proton, and also came up with the planetary model
Chadwick - discovered the electron by bombarding a sample of beryllium with alpha particles]]> 2022-10-04 08:15:27 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2325240743 frncsmanaois https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2325250768 2022-10-04 08:22:56 UTC https://padlet.com/frncsmanaois/4ewkbs1822f59bv3/wish/2325250768