Chemistry UNIT 1.6

• Ionisation energy increases along a period
• Ionisation decreases down a group
• Along a period the melting and boiling points varies depending on structure and bond strength
• Down a group melting a boiling points depends on bond strength or the intermolecular forces between the atoms
• Group 7- reactivity decreases down the group
• Group 7 reacts with a metal and produces a salt
• Group 7 - oxidising power decreases down the group
• Reactions with silver nitrate gives off different precipitates
• Chlorine is used to kill bacteria in water