GCSE Chemistry – Group 1 Elements – Alkali Metals | Properties | Reactivity (2026/27 exams)

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*** WHAT’S COVERED ***
1. Properties of Alkali Metals (Group 1)
* Physical properties such as being soft with low densities and low melting points.
* High reactivity compared to other metals.
2. Trends in Group 1
* How reactivity increases down the group.
* How melting and boiling points decrease down the group.
3. Explaining Reactivity
* The role of the single outer shell electron in their reactivity.
* Why reactivity increases down the group, related to atomic radius and the attraction to the outer electron.
4. Formation of Ionic Compounds
* How alkali metals react with non-metals by donating an electron.
* The properties of the resulting ionic compounds, such as being white solids that form colourless solutions in water.
5. Specific Reactions of Alkali Metals
* Reaction with water to produce a metal hydroxide and hydrogen.
* Reaction with chlorine to produce metal chloride salts.
* Reaction with oxygen to produce various metal oxides, peroxides, and superoxides.

*** CHAPTERS ***
0:00 Introduction
0:21 Physical Properties
0:45 Trends Down the Group
1:15 Explaining Reactivity
2:49 Ionic Compounds
3:42 Reaction with Water
4:28 Reaction with Chlorine
4:50 Reaction with Oxygen

*** PLAYLISTS ***

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