ionic bonding

• What are the three types of bonding mentioned?

  Ionic, covalent, and metallic
• What happens when a metal and a non-metal react together?

  The metal loses electrons, forming a cation
• What is formed when a non-metal gains electrons?

  A negative ion called an anion
• What is the nature of the attraction between oppositely charged ions?

  It is called an ionic bond
• What does the sodium atom become after losing its outer electron?

  An Na⁺ ion
• How do dot and cross diagrams represent ionic compounds?

  • Show arrangement of electrons
  • Electrons represented by dots or crosses
  • Indicate origin of electrons in ions
• What does the chlorine atom become after gaining an electron?

  A Cl⁻ ion
• How can you determine how many electrons an atom will gain or lose?

  • Use the atom's group number
• What is the chemical formula for sodium chloride?

  NaCl
• How do the charges of sodium and chloride ions relate to their formation?

  Sodium becomes Na⁺, chloride becomes Cl⁻