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The Electrical Nature of Matter
MatterMatter – anything that takes up space and has mass
Matter is made of atoms which have 3 parts Protons - _______ charge, located ________Neutrons - _______ charge, located _________Electrons - ______ charge, located _________
AtomsThe basic structure of an atom has a centre (nucleus) with electrons around the outside…
Atoms…
MatterMatter – anything that takes up space and has mass
Matter is made of atoms which have 3 parts Protons - + charge, located in the nucleusNeutrons - 0 charge, located in the nucleusElectrons - - charge, located around the outside ONLY ELECTRONS MOVE IN ELECTRICITY – small and around the outside of an atom!
• In some elements like copper, electrons can move more freely = good conductors
• In other elements like sulphur electrons are held strongly = insulators
Which are good conductors?
• Wooden block• Plastic water bottle• Metal fork
Insulators and Conductors
Law of Electric Charges
Like charges repel one another, and unlike charge attract one another
“Opposites Attract”
OR
BUT……..
Observation
- When 2 charged objects come closer together the attraction or repulsion increases (opposite for when they are moved further apart)Charles-Augustin de Coulomb
Static Electricity
• a charge on a substance that stays in the same place (static = not moving)
• electric charges: + and – stay in place
• If more e- than p+ build up then the object becomes _________ charged.
• If less e- than p+ build up then the object becomes __________ charged.
Static Electricity
Neutral Positive Negative
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