Mystery #2Tier 2chemistry / reactions
Why does iron go rusty?
Leave an iron nail outside and it slowly turns crumbly and orange-brown: rust. But a nail kept dry indoors stays shiny for years. What turns strong iron into flaky rust?
Your guess
What's your hunch about what makes iron turn rusty?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
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