1.1.2 Isotopes

• What is the defining difference between isotopes of the same element?

  Number of neutrons
• What is the atomic number of carbon in the periodic table?

  6
• What do isotopes of the same element have in common?

  Number of protons
• Why do isotopes of the same element have different mass numbers?

  Different number of neutrons
• The key difference between isotopes of the same element is their number of neutrons
• Isotopes of the same element have different mass numbers due to varying numbers of neutrons.


  True
• Match the hydrogen isotope with its properties:

  Protium ↔️ ¹H

  Deuterium ↔️ ²H

  Tritium ↔️ ³H
• Carbon-12 has 6 protons
• What is the difference between isotopes of the same element in terms of their mass numbers?

  Number of neutrons
• What is the atomic number of all isotopes of carbon?

  6
• Isotopes of the same element have the same number of protons but different numbers of neutrons.
• Match the hydrogen isotope with its correct AX notation:

  Protium ↔️ ¹H

  Deuterium ↔️ ²H

  Tritium ↔️ ³H
• Carbon-14 is used in radioactive dating to determine the age of organic materials.
• Which isotope is used in industrial monitoring to ensure product quality?

  Americium-241
• All isotopes of carbon have the same atomic number.


  True
• The mass number of an isotope is determined by the sum of protons and neutrons
• Isotopes are listed individually in the periodic table.

  False
• Isotopes have the same number of protons but different numbers of neutrons.


  True
• Carbon-13 has 7 neutrons
• The isotope name-mass number notation includes the element name followed by the mass number.


  True
• Isotopes have the same atomic number but different mass numbers.


  True
• Isotopes of hydrogen have the same atomic number but different mass numbers.


  True
• Isotopes of the same element have the same atomic number but different mass numbers.
• Isotopes of the same element have identical physical properties.

  False
• Steps to distinguish isotopes using notation:

  1️⃣ Identify the AX notation

  2️⃣ Use the isotope name-mass number
• Technetium-99m is used for bone scans in medical imaging.


  True
• Isotopes have the same atomic number but different mass numbers
• Arrange the carbon isotopes in increasing order of their mass numbers.

  1️⃣ Carbon-12

  2️⃣ Carbon-13

  3️⃣ Carbon-14
• Match the carbon isotope with its number of neutrons:

  Carbon-12 ↔️ 6

  Carbon-13 ↔️ 7

  Carbon-14 ↔️ 8
• Isotopes have the same atomic number
• All isotopes of carbon have the same number of protons.


  True
• In the A X notation, the mass number is written as a superscript
• The mass number of an isotope reflects the total number of protons and neutrons
• Carbon-13 has 7 neutrons
• Isotopes are listed individually in the periodic table.

  False
• Match the hydrogen isotope with its number of neutrons:

  Protium ↔️ 0

  Deuterium ↔️ 1

  Tritium ↔️ 2
• What is the mass number of carbon-13?

  13
• The mass number in isotope notation reflects the total number of protons and neutrons.


  True
• What isotope is used in medical imaging to diagnose thyroid disorders?

  Iodine-131