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Questions and Answers
What is the most abundant element in the Earth's crust?
What is the most abundant element in the Earth's crust?
- Silicon (correct)
- Iron
- Carbon
- Oxygen
What is the chemical symbol for oxygen?
What is the chemical symbol for oxygen?
- O2
- CO2
- O3
- O (correct)
Which subatomic particle has a positive charge?
Which subatomic particle has a positive charge?
- Neutron
- Positron
- Proton (correct)
- Electron
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