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Questions and Answers
Which of the following statements about isotopes is correct?
Which of the following statements about isotopes is correct?
- Isotopes are atoms with the same number of neutrons but different number of protons.
- Isotopes are atoms with the same number of electrons but different number of neutrons.
- Isotopes are atoms with the same number of protons but different number of neutrons. (correct)
- Isotopes are atoms with the same number of protons but different number of electrons.
What is the significance of isotopes in chemistry?
What is the significance of isotopes in chemistry?
- Isotopes have the same chemical properties but different physical properties.
- Isotopes have both the same chemical and physical properties.
- Isotopes have neither the same chemical nor physical properties.
- Isotopes have the same physical properties but different chemical properties. (correct)
How are isotopes of an element represented?
How are isotopes of an element represented?
- Isotopes are represented by the same chemical symbol followed by a different atomic mass. (correct)
- Isotopes are represented by the same chemical symbol followed by a different number of protons.
- Isotopes are represented by the same chemical symbol followed by a different number of electrons.
- Isotopes are represented by the same chemical symbol followed by a different number of neutrons.
Which of the following is NOT a phase change?
Which of the following is NOT a phase change?
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What is the process called when a gas changes directly into a solid without going through the liquid phase?
What is the process called when a gas changes directly into a solid without going through the liquid phase?
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Which phase change involves a substance changing from a solid directly into a gas without becoming a liquid first?
Which phase change involves a substance changing from a solid directly into a gas without becoming a liquid first?
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