Lesson overview:Group 7

• Describe the trends in physical and chemical properties of Group 7 elements
• Write word equations to represent Group 7 element reactions
• Describe the displacement reactions of Group 7 elements

Volatility is the tendency of a substance to evaporate at room temperatures. Sublimation is the process of changing state directly from solid to gas, with no liquid phase. A displacement reaction occurs when a more reactive element pushes a less reactive element out of a compound.