Question detail
Which statement is true about elements?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Key ideas in chemistry
Question
- A. All elements have the same number of electrons as protons.
- B. Elements can be formed by combining atoms of different elements.
- C. Each element has a unique atomic number that determines its identity.
- D. Elements are always found in pure form in nature.
Answer
The correct option is Each element has a unique atomic number that determines its identity.. This answer is correct because it matches the approved learning objective to describe elements as different naturally occurring types of atoms in the subtopic Universal chemistry ideas.
Explanation
The correct option is Each element has a unique atomic number that determines its identity.. Each element has a unique atomic number that determines its identity. is correct because it directly supports the approved learning objective to describe elements as different naturally occurring types of atoms. This belongs to the subtopic Universal chemistry ideas within Key ideas in chemistry, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Universal chemistry ideas.
Common mistake
Confusing Atoms and Elements
Students often think that atoms and elements are the same thing.
Remember that an atom is a single particle, while an element is a type of atom. For example, oxygen is an element made up of oxygen atoms.
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