PHYSICAL PROPERTIES

• WHAT HAPPENS TO ELECTRONEGATIVITY DOWN THE GROUP?

  decreases
• WHAT HAPPENS TO ATOMIC (COVALENT) RADIUS DOWN THE GROUP?

  increases
• WHAT HAPPENS TO MELTING POINT DOWN THE GROUP?

  increases
• WHAT HAPPENS TO BOILING POINT DOWN THE GROUP?

  increases
• WHAT DECREASES DOWN GROUP 7?

  electronegativity
• WHAT INCREASES DOWN GROUP 7?

  atomic radius, melting point, boiling point
• APPEARANCE OF EACH GROUP 7 ELEMENT?

  F2: yellow gas

  Cl2: green gas

  Br2: brown liquid

  -> easily forms orange vapour/ used as solution in water (yellow-orange bromine water)

  I2: grey crystalline solid

  -> easily forms purple vapour/ used as solution in water (brown "iodine" solution)