IGCSE Chemistry · Topic 8.2.2 · CoreGroup I: The Angry Swimmers
Why do alkali metals get more violent as you go down Group I?
⚠️HAZARD WARNING
Group I metals + water → Hydrogen gas (explosive) + strong alkali. Always use a safety screen. Never touch with bare hands.
Virtual Trough — Universal Indicator Water
Select a metal and drop it into the trough. Watch the indicator change colour as the alkali forms.
👆 Select a metal above to begin the experiment
Cambridge IGCSE Chemistry 0620 · Syllabus 8.2.2 Core · 2026–2028