11th Grade Chemistry Challenge
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Questions and Answers

Match the following chemical elements with their atomic numbers:

Carbon = 6 Oxygen = 8 Sodium = 11 Iron = 26

Match the following chemical reactions with their type:

Combustion of methane = Combustion Photosynthesis = Endothermic Rusting of iron = Oxidation-reduction Neutralization of acid and base = Exothermic

Match the following chemical compounds with their common uses:

Sodium chloride = Table salt Calcium carbonate = Antacid Hydrogen peroxide = Bleaching agent Sulfuric acid = Battery acid

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