Notesale: Turn your study into money

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Key​ ​Terms
Atom:​​ ​The​ ​smallest​ ​particle​ ​of​ ​an​ ​element​ ​that​ ​retains​ ​the​ ​identity​ ​of​ ​the​ ​element
Elements:​​ ​A​ ​substance​ ​consisting​ ​of​ ​atoms​ ​which​ ​all​ ​have​ ​the​ ​same​ ​number​ ​of​ ​protons
Dalton
- Dalton​ ​was​ ​born​ ​September​ ​6,​ ​1766​ ​and​ ​died​ ​July​ ​27,​ ​1844
- In​ ​the​ ​early​ ​1800’s,​ ​John​ ​Dalton​ ​experimented​ ​with​ ​different​ ​gases​ ​and​ ​liquids​ ​to​ ​try​ ​to
change​ ​their​ ​chemical​ ​changes
- When​ ​Dalton​ ​broke​ ​down​ ​water​ ​using​ ​an​ ​electric​ ​current,​ ​he​ ​was​ ​able​ ​to​ ​observe​ ​that
when​ ​the​ ​hydrogen​ ​and​ ​oxygen​ ​formed,​ ​they​ ​had​ ​very​ ​different​ ​properties​ ​from​ ​the
original​ ​water
- Using​ ​experiments​ ​like​ ​those,​ ​Dalton​ ​created​ ​a​ ​theory​ ​that​ ​is​ ​now​ ​called​ ​Dalton’s​ ​atomic
theory
- Dalton​ ​referred​ ​to​ ​the​ ​atom​ ​as​ ​a​ ​small,​ ​hard,​ ​indestructible​ ​sphere​ ​that​ ​is​ ​the​ ​smallest
particle​ ​of​ ​an​ ​element
- Dalton​ ​decided​ ​to​ ​try​ ​created​ ​a​ ​model​ ​of​ ​an​ ​atom​ ​based​ ​on​ ​his​ ​knowledge
- Dalton​ ​stated​ ​that​ ​different​ ​elements​ ​are​ ​composed​ ​of​ ​different​ ​atoms
- Although​ ​in​ ​the​ ​end,​ ​Dalton’s​ ​work​ ​was​ ​an​ ​invaluable​ ​contribution​ ​to​ ​the​ ​understanding
of​ ​atoms,​ ​elements​ ​and​ ​matter
...
​ ​The​ ​atoms​ ​of​ ​one
element​ ​are​ ​different​ ​in​ ​mass​ ​and​ ​size​ ​from​ ​the​ ​atoms​ ​of​ ​other​ ​elements

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