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Questions and Answers
What is the chemical formula for carbon dioxide?
What is the chemical formula for carbon dioxide?
- C2O2
- C2O
- CO2 (correct)
- CO
What is the overall charge of the nitrate ion (NO3-)?
What is the overall charge of the nitrate ion (NO3-)?
- +3
- +1
- -1 (correct)
- 0
What is the difference between isotopes of an element?
What is the difference between isotopes of an element?
- They have different numbers of neutrons. (correct)
- They have different chemical properties.
- They have different numbers of electrons.
- They have different numbers of protons.
Which of the following is true about carbon-12 and carbon-14?
Which of the following is true about carbon-12 and carbon-14?
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What type of particles can some isotopes emit?
What type of particles can some isotopes emit?
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What is the charge of a proton?
What is the charge of a proton?
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In a neutral atom, why do positive and negative charges cancel each other out?
In a neutral atom, why do positive and negative charges cancel each other out?
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What type of ions are formed when atoms gain or lose electrons?
What type of ions are formed when atoms gain or lose electrons?
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What percentage of an atom's volume consists of empty space?
What percentage of an atom's volume consists of empty space?
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How are molecules formed?
How are molecules formed?
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