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Elements

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Questions and Answers

Which one of these is true about compounds?

They have the same properties as their constituent elements

They can be broken down into other substances by chemical reactions

They are made up of two or more elements in a fixed ratio (correct)

They are only found in living organisms

Which one of these elements is required in very minute quantities?

Carbon

Oxygen

Fluorine (correct)

Calcium

Which element makes up the largest percentage of the human body by weight?

Carbon

Hydrogen

Oxygen (correct)

Nitrogen

Which one of these elements is not mentioned as a trace element in the human body?

<p>Sulfur</p> Signup and view all the answers

Which one of these is true about species and toxic elements?

<p>Species can evolve or adapt to environments containing toxic elements</p> Signup and view all the answers

Elements

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Questions and Answers

Which one of these is true about compounds?

Which one of these elements is required in very minute quantities?

Which element makes up the largest percentage of the human body by weight?

Which one of these elements is not mentioned as a trace element in the human body?

Which one of these is true about species and toxic elements?

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