Review of Blue Tack Prac All atoms of a type of element are the same size. Pure substances have only...
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Transcript of Review of Blue Tack Prac All atoms of a type of element are the same size. Pure substances have only...
![Page 1: Review of Blue Tack Prac All atoms of a type of element are the same size. Pure substances have only one type of particle Helium does not react, Elements.](https://reader036.fdocuments.net/reader036/viewer/2022062618/5513e01b55034679748b53e4/html5/thumbnails/1.jpg)
Review of Blue Tack Prac
• All atoms of a type of element are the same size.
• Pure substances have only one type of particle
• Helium does not react, Elements with lose electrons are metals.
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Discovered 1895 in Sun then found on earth.Helium is so light it leaks to outer space31 pm across, (pm = trillionth of a metre)Inert meaning will not burn or form a chemical reation.1916 picture (Year 9) shows two electrons, two neutrons, two protonsGlenn and Matt’s model is good, but would be perfectly round With solid surface.
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Good snap shot of He perhaps sticking to a very very cold surfaceAll He are identical, I have photoshoped a Li atom
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H2 Gas 3D all Molecules are theSame size
In real life it looks likeA football, spins and vibrates
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Glenn and Matt, 3 types of oxygen, O3 is ozone, the O will bump into a O2
And from O3
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Expt: Chemical Change
• Statement: Chemical Change rearranges atoms, making new compounds.
• Aim: Explain what happens to the compounds, weigh them before and after
• Method– Crush CaCO3 (Marble chips) with a morta and pestle– Weigh powder on balance (how will you hold the
powder? - ans in book)– In a beaker Measure approx.40ml of 2M HCl (2M
refers to the strength, HCl is Hydrochloric acid) (What safety precautions will you take?)
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• Weigh beaker and solution (Do you see any difference with the beam balance when different people use it, when pushed down then to rest, pushed up to rest?)
• Show weights in a Table to Teacher, and diagram.
• Mix solutions and observe• Reweight final product• Explain your results.
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http://www.netdenizen.com/buttonmill/glassy.php
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S Stored as sugar (Food Energy)
M Moved from pack, down mouth, stomach, gut to liver
S Stored as animal starch in liver
M Moved in blood stream to cell as sugar
S Stored as animal starch in cell
C Burnt in cell with oxygen to energize APT
C APT pulls back mini sprung legs
U Springs are triggered releasing heat and motion(muscle power or Energy)
U
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S Stored as Coal (Chemical Energy)
M Moved from earth to Powerstation (Chemical Fuel)
S Stored at power station
M Moved to burn chamber
Burned to make heat (Heat Energy)C
Moved to steam
C
M
Changed from heat into motion (Kinetic Energy)
C Changed from motion to electricity in GeneratorElectrical Energy