Which of the following is an element?

Prepare for the NLN PAX Science Exam with flashcards and multiple choice questions. Each question includes hints and detailed explanations to boost your confidence and exam readiness.

Multiple Choice

Which of the following is an element?

Explanation:
An element is a pure substance made of only one kind of atom and cannot be broken down into simpler substances by chemical means. Oxygen is that among the options because it is a single type of atom (O). The others are compounds: water is made from hydrogen and oxygen in a fixed ratio (H2O), salt is sodium chloride (NaCl), and sugar is a larger molecule composed of carbon, hydrogen, and oxygen. So the element here is oxygen.

An element is a pure substance made of only one kind of atom and cannot be broken down into simpler substances by chemical means. Oxygen is that among the options because it is a single type of atom (O). The others are compounds: water is made from hydrogen and oxygen in a fixed ratio (H2O), salt is sodium chloride (NaCl), and sugar is a larger molecule composed of carbon, hydrogen, and oxygen. So the element here is oxygen.

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