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Questions and Answers
Approximately how many elements occur naturally in the earth?
Approximately how many elements occur naturally in the earth?
- 12
- 50
- 120
- 92 (correct)
What is a substance that is formed from atoms?
What is a substance that is formed from atoms?
- Molecule
- Element
- Compound (correct)
- Atomizer
Which statement about elements is true?
Which statement about elements is true?
- Most elements occur in pure form in the earth's crust.
- Elements are composed of subatomic particles.
- Elements are composed of compounds.
- Elements are composed of atoms that have different physical and chemical properties. (correct)
What are electrons and neutrons?
What are electrons and neutrons?
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What is an isotope?
What is an isotope?
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