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more on the january exam - Coggle Diagram
more on the january exam
Magnetism
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Magnet is an object that can attract IRON, COBALT, NICKEL
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If a magnet is broken into pieces, each piece has its own north and south poles
Electro magnetism
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thus, the magnetic fields only lasts as long as the current flows
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energy
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energy efficiency
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However, when we build machines capable of changing energy from one form to another, it can rarely convert ALL the energy it consumes into a useful form
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atoms and elements
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alkali metals
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soft, most reactive metals
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Noble gases
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very stable, which means they rarely react with other elements
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