C1.2.2 Isotopes

• Isotopes have the same chemical properties because they have the same number of protons and electrons.


  True
• Steps to explain why isotopes are isotopes using carbon as an example:

  1️⃣ Carbon has two common isotopes: carbon-12 and carbon-14

  2️⃣ Both have 6 protons

  3️⃣ Carbon-12 has 6 neutrons

  4️⃣ Carbon-14 has 8 neutrons
• The mass number is the total number of protons and neutrons in the nucleus of an atom.
• The atomic number of an element determines its chemical behavior.


  True
• The atomic number is the number of protons in the nucleus of an atom.
• Carbon-12 and carbon-14 have the same number of protons but different numbers of neutrons.


  True
• What is the mass number of an atom?

  Protons + Neutrons
• The mass number includes both protons and neutrons.
• Carbon-12 is written as ^12^C in isotope notation.


  True
• Radioactive isotopes undergo decay to achieve a more stable configuration.


  True
• What defines isotopes of the same chemical element?

  Same Protons, Different Neutrons
• Isotopes are represented using the element symbol and the mass number.
• Carbon-12 and carbon-14 share the same number of protons
• What results from isotopes having the same number of protons but different neutrons?

  Same atomic number, different mass numbers
• The mass number in isotope notation is written as a superscript to the left of the element symbol
• Steps involved in radioactive decay:

  1️⃣ Imbalance in protons and neutrons

  2️⃣ Radioactive decay occurs

  3️⃣ Emission of particles or energy

  4️⃣ Achieving a more stable configuration
• Isotopes are atoms of the same chemical element that have the same number of protons in the nucleus but a different number of neutrons.neutrons
• Isotopes are often represented using the element symbol and mass number, e.g. ^14^C for the carbon-14 isotope.symbol
• Carbon-14 is a stable isotope of carbon.

  False
• Match the atomic property with its definition:

  Mass Number ↔️ Protons + Neutrons

  Atomic Number ↔️ Protons only

  Symbol for Mass Number ↔️ A

  Symbol for Atomic Number ↔️ Z
• Carbon-12 has 6 neutrons while carbon-14 has 8 neutrons.
• Isotopes share the same atomic number
• Carbon-14 is a radioactive isotope.
• What is the atomic number of an atom?

  Number of Protons
• How is the mass number written in isotope notation?

  Superscript to the Left
• The stability of isotopes depends on the balance between protons and neutrons.
• What are the three types of radioactive decay?

  Alpha, Beta, Gamma
• Isotopes have the same chemical properties but can have different physical properties.

  True
• What are isotopes defined as in terms of protons and neutrons?

  Same protons, different neutrons
• Carbon-12 is stable, while carbon-14 is radioactive.

  True
• The mass number includes both protons and neutrons, while the atomic number only counts protons.


  True
• What is the proton-to-neutron ratio in stable isotopes?

  Balanced
• Radioactive isotopes undergo decay to achieve stability.


  True
• Match the hydrogen isotope with its unique name:

  Hydrogen-1 ↔️ Protium

  Hydrogen-2 ↔️ Deuterium

  Hydrogen-3 ↔️ Tritium