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Card 16

Front

what is the main difference in structures between thermosetting and thermosoftening plastics?

Back

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Card 17

Front

what allows thermosoftening polymers to be remoulded?

Back

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Card 18

Front

what is a nano-particle?

Back

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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

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Card 20

Front

why do we count only protons and neutrons to calculate the mas number of an atom?

Back

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Card 21

Front

how many protons neutrons and electrons are there in an atoms of 19F9?

Back

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Card 22

Front

what are isotopes?

Back

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Card 23

Front

what is the mass of one mole of sodium atoms?

Back

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Card 24

Front

why is the relative atomic mass of chlorine not a whole number?

Back

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Card 25

Front

why is it not usually possible to get 100% yield from a chemical reaction?

Back

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