Isotopes: Understanding Their World

What defines an isotope of an element?

• Atoms with the same number of protons but different numbers of electrons

• Atoms with the same number of neutrons but different numbers of protons

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of electrons but different numbers of protons

Which of the following is NOT an isotope of Hydrogen?

• Deuterium

• Tritium

• Protium

• Helium-3

How is isotopic notation correctly represented?

• The mass number is written to the left of the element symbol, and the atomic number is written to the right.

• The atomic number is written to the left of the element symbol, and the mass number is written to the right.

• The mass number is written above the element symbol, and the atomic number is written below.

• The atomic number is written above the element symbol, and the mass number is written below.

What does isotopic abundance refer to?

• The relative amount of energy an isotope can produce

• The percentage of an isotope present in a natural sample of the elemental mixture

• The mass of an isotope compared to the mass of the element

• The number of isotopes an element has

Which of the following applications of isotopes is incorrect?

• Carbon-14 is used in radiocarbon dating.

• Uranium-235 is used in nuclear reactors.

• Iodine-131 is used in treating thyroid disorders.

• Oxygen-16 is used in magnetic resonance imaging (MRI).

What is the isotopic notation for Carbon-14?

Why are isotopes important in the field of archaeology?

• They can be used to determine the age of artifacts.

• They help in determining the chemical composition of artifacts.

• They are used to restore damaged artifacts.

• They increase the durability of artifacts.

Which isotope is commonly used in the treatment of cancer?

• Carbon-12

• Uranium-238

• Cobalt-60

• Hydrogen-1

What is the significance of isotopic abundance in determining atomic mass?

• It helps in identifying the most reactive isotope of an element.

• It is used to calculate the average atomic mass of an element based on the abundance of its isotopes.

• It determines which isotope will be used in nuclear reactors.

• It identifies the isotope that is most abundant in nature.

Which of the following statements about isotopes is false?

• Isotopes of an element have different physical properties but similar chemical properties.

• All isotopes of an element are radioactive.

• Isotopes can be used in medical diagnosis and treatment.

• The isotopic composition of an element can vary in different natural sources.