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Title: Materials Properties (Atoms)
Description: The notes cover the structure of an atoms, what charge they are and a few of the scientists including the 3 scientists that discovered or contributed in discovering atoms, calculations on how to calculate the amount of atoms in the nucleus and mass number, how to draw an electronic configuration or arrangement. It also covers Group 1 "Alkali Metals" Group 7 "Halogens" Group 8 "Nobel Gasses" and their properties. *Recommended for Year 8 (KS3)
Description: The notes cover the structure of an atoms, what charge they are and a few of the scientists including the 3 scientists that discovered or contributed in discovering atoms, calculations on how to calculate the amount of atoms in the nucleus and mass number, how to draw an electronic configuration or arrangement. It also covers Group 1 "Alkali Metals" Group 7 "Halogens" Group 8 "Nobel Gasses" and their properties. *Recommended for Year 8 (KS3)
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Atoms
Atoms are indivisible (Cannot be broken down)
Protons, Neutrons and Electrons are subatomic particles
Protons (+ve): Positive Charge
Neutron - No Charge
Electrons (-ve): Negative Charge
JJ Thompson:
Plum Pudding Model, discovered Electrons
James Chadwick:
Discovered Neutrons
Ernest Rutherford:
Gold Foil Experiment, discovered Proton and Nucleus, contributed to
the model of the atom
Atom = Proton + Neutron + Electron
Nucleus = Proton + Neutron
Electrons has NO MASS
Neutron & Proton has MASS
Number Of Protons = Number Of Electrons
Elements & Periodic Table
There are 118 Elements in a periodic table
...
Atomic Number: Number Of Protons and Electrons
Mass Number: Total Number Of Protons And Neutrons in the atom
...
Properties:
- Soft
- Shiny
- React with water vigorously
- Conduct electricity well
Reaction:
- Metal + water -> Metal hydroxide + hydrogen gas
Eg: Sodium + Water -> Sodium hydroxide + hydrogen gas
Test for an alkali solution:
- Using Litmus Paper
- Universal Indicator
Group 7 Elements
Known as ‘Halogens’
They are ‘Non-Metals’
As you go down the group……
Reactivity decreases
Boiling Point increases
Melting Point increases
They are gases at room temperature and Bromime is a liquid
...
They are inert (Unreactive) and can’t form any compound
As you go down the group…
Title: Materials Properties (Atoms)
Description: The notes cover the structure of an atoms, what charge they are and a few of the scientists including the 3 scientists that discovered or contributed in discovering atoms, calculations on how to calculate the amount of atoms in the nucleus and mass number, how to draw an electronic configuration or arrangement. It also covers Group 1 "Alkali Metals" Group 7 "Halogens" Group 8 "Nobel Gasses" and their properties. *Recommended for Year 8 (KS3)
Description: The notes cover the structure of an atoms, what charge they are and a few of the scientists including the 3 scientists that discovered or contributed in discovering atoms, calculations on how to calculate the amount of atoms in the nucleus and mass number, how to draw an electronic configuration or arrangement. It also covers Group 1 "Alkali Metals" Group 7 "Halogens" Group 8 "Nobel Gasses" and their properties. *Recommended for Year 8 (KS3)