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Questions and Answers
What is the atomic number of carbon?
What is the atomic number of carbon?
- 8
- 4
- 12
- 6 (correct)
What makes an element unique?
What makes an element unique?
- The arrangement of protons and neutrons
- The combination of protons and electrons
- The number of protons in its nucleus (correct)
- The number of electrons in its nucleus
How many naturally occurring elements are there on earth?
How many naturally occurring elements are there on earth?
- 118
- 24
- 6
- 91 (correct)
Which element has an atomic number of 8?
Which element has an atomic number of 8?
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What is the main criterion used to identify each element?
What is the main criterion used to identify each element?
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Which two elements are the simplest chemically unique components of water?
Which two elements are the simplest chemically unique components of water?
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How many naturally occurring elements play normal physiological roles in humans?
How many naturally occurring elements play normal physiological roles in humans?
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Which two-letter symbol represents iron on the periodic table?
Which two-letter symbol represents iron on the periodic table?
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