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Card 16
Front
what is the main difference in structures between thermosetting and thermosoftening plastics?
Back
Card 17
Front
what allows thermosoftening polymers to be remoulded?
Back
Card 18
Front
what is a nano-particle?
Back
Card 19
Front
scientists have developed a new deodorant using nano particles. what should be done before it is sold for people to use?
Back
Card 20
Front
why do we count only protons and neutrons to calculate the mas number of an atom?
Back
Card 21
Front
how many protons neutrons and electrons are there in an atoms of 19F9?
Back
Card 22
Front
what are isotopes?
Back
Card 23
Front
what is the mass of one mole of sodium atoms?
Back
Card 24
Front
why is the relative atomic mass of chlorine not a whole number?
Back
Card 25
Front
why is it not usually possible to get 100% yield from a chemical reaction?
Back
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