group 0 noble gases

• What is the symbol for Argon?

  Ar
• What is the mass of Argon?

  40
• What is the proton number of Argon?

  18
• Is Argon a metal or a non-metal?

  Non-metal
• How many protons are in an atom of Argon?

  18
• How many neutrons are in an atom of Argon?

  22
• How many electrons are in an atom of Argon?

  18
• What does unreactive mean in terms of Argon?

  It does not readily combine with other elements
• What are the key facts about Group 0 elements?

  • Called Noble gases
  • Non-metals
  • Exist as single atoms (monatomic)
  • Unreactive due to full outer shell of electrons
• What is the electronic structure of Argon?

  2, 8, 8
• What is the trend in boiling points for Group 0 elements?

  Boiling points increase down the group
• How can you predict the boiling point of Krypton (Kr)?

  By analyzing the trend in boiling points
• Why are the boiling points of noble gases very low?

  Due to weak van der Waals forces
• What are some uses of noble gases like He, Ne, and Ar?

  • Helium: Balloons, cooling superconductors
  • Neon: Signs, lighting
  • Argon: Welding, preserving materials
• How many electrons does Beryllium (Be) have in its outer shell?

  2
• How many electrons does Potassium (K) have in its outer shell?

  1
• How many electrons does Argon (Ar) have in its outer shell?

  8
• How many electrons does Radon (Rn) have in its outer shell?

  8
• How many electrons does Boron (B) have in its outer shell?

  3
• How many electrons does Helium (He) have in its outer shell?

  2
• How many electrons does Radium (Ra) have in its outer shell?

  2
• How many electrons does Iodine (I) have in its outer shell?

  7
• Why are noble gases so unreactive?

  • Full outer shell of electrons
  • Stable electron configuration
  • Do not easily form bonds