1.简单
Which element has the symbol Fe?
- AFluorine
- BFermium
- CFrancium
- DIron
Which element has the symbol Fe?
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Which technique is used to separate the different coloured dyes in an ink?
A room is at 25 °C. What is this temperature in kelvin?
In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which species loses electrons?
To which family of organic compounds does ethanol, C₂H₅OH, belong?
What is the formula of iron(III) chloride?
Which compound contains both ionic and covalent bonds?
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