quiz on human nose

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Which of the following is an alkali metal?

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Which element is most abundant in the Earth's crust?

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What type of bond is formed when electrons are shared between atoms?

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What is the atomic number of Carbon?

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What is the chemical formula for sulfuric acid?

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What is the pH of pure water at 25°C?

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Which subatomic particle has a negative charge?

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Which gas is released during photosynthesis?

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quiz on human nose
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