1) Which of the following refers to a pure substance made up of only one type of atom? a) compound b) element c) mixture d) solution 2) Which of the following is an example of compound? a) calcium b) carbon dioxide c) iron d) potassium 3) Which of the following is the chemical symbol of potassium? a) Ca b) Fe c) K d) P 4) Which of the following is an example of element? a) carbon dioxide b) carbon peroxide c) potassium chloride d) sulfur 5) Which of the following elements is found in compounds in bones, teeth, and body fluids? a) calcium b) magnesium c) potassium d) sodium

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