isotopes Flashcards
What is an isotope?
An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.
True or False: Isotopes of an element have different chemical properties.
False. Isotopes have the same chemical properties because they have the same number of electrons.
Fill in the blank: Isotopes are identified by their ______ number.
mass
What is the mass number of an isotope?
The mass number is the total number of protons and neutrons in the nucleus of an atom.
Which of the following is an example of an isotope? A) Carbon-12 B) Nitrogen C) Oxygen-16
A) Carbon-12
What is the difference between Carbon-12 and Carbon-14?
Carbon-12 has 6 neutrons, while Carbon-14 has 8 neutrons.
True or False: All isotopes are radioactive.
False. Some isotopes are stable, while others are radioactive.
What is a radioactive isotope?
A radioactive isotope is an isotope that is unstable and decays over time, emitting radiation.
Multiple Choice: Which isotope is commonly used in carbon dating? A) Carbon-12 B) Carbon-14 C) Carbon-16
B) Carbon-14
What is the term for the process by which a radioactive isotope decays?
Radioactive decay
Fill in the blank: The number of protons in an atom determines its ______.
element
What is the symbol for the isotope of hydrogen with one proton and one neutron?
Deuterium (D or ²H)
True or False: Isotopes of an element have the same atomic number.
True. Isotopes have the same atomic number.
What is the significance of isotopes in medicine?
Isotopes are used in medical imaging and cancer treatment.
What distinguishes stable isotopes from unstable isotopes?
Stable isotopes do not undergo radioactive decay, while unstable isotopes do.
