Marie mixed 5 g of carbon with 5 g of lead oxide.
She heated the mixture strongly for 15 minutes in a fume cupboard.
After 15 minutes, Marie found some shiny beads in the mixture.
a.
i) Marie collected all the shiny beads from this experiment.
How could she test them to show they were metal?
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ii) Marie’s test showed that the tiny beads were metal.
What metal were the beads likely to be?
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b. Marie also expected carbon dioxide to be formed in this experiment.
i) In carbon dioxide, what element is combined with carbon?
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ii) Where, apart from the air, did this element come from in this experiment?
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