Group 1: Alkali Metals
The alkali metals are soft, reactive metals in Group 1 that react with water to form hydroxides and hydrogen.
▶ Interact
Play with the controls to see the idea in action.
📘 Learn
The alkali metals are soft, reactive metals in Group 1 that react with water to form hydroxides and hydrogen.
- Reactivity increases down the group
- They have one outer electron
- Stored under oil to prevent reaction
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is Group 1: Alkali Metals?
Within Chemistry, which covers atoms, bonding, reactions, the periodic table, organic chemistry and the chemistry of everyday life, this topic explains Group 1: Alkali Metals. Chemistry links what you can see in the lab to the particles and bonds behind it, so each topic here shows that link in a model.
Check that you can explain Group 1: Alkali Metals in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding Group 1: Alkali Metals helps you explain why substances behave as they do, from cleaning products and food to medicines.
Group 1: Alkali Metals in detail
The alkali metals (lithium, sodium, potassium, rubidium, caesium) are soft, shiny metals with low density and low melting points. Each has one outer electron, which it loses easily to form a 1+ ion.
They react vigorously with water to produce hydrogen and a metal hydroxide, which forms an alkaline solution: 2Na + 2H₂O → 2NaOH + H₂. Reactivity increases down the group, because the outer electron is further from the nucleus and is lost more easily. Lithium fizzes, sodium melts into a ball, and potassium ignites with a lilac flame. They are stored under oil.
How the interactive helps you understand Group 1: Alkali Metals
Watch the reaction model in the interactive. Use any sliders or buttons it offers to change the values and see how the reaction model responds.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of Group 1: Alkali Metals.
Real-life uses and examples
- Link Group 1: Alkali Metals to everyday products such as cleaning agents, food and medicines.
- Read a chemical equation or diagram and work out what Group 1: Alkali Metals shows.
- Explain Group 1: Alkali Metals in an exam by linking the particles involved to what you observe.
Common mistakes to avoid
- Mixing up the names of substances or ions when you describe Group 1: Alkali Metals.
- Describing what happens without explaining the particles or bonds involved.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about Group 1: Alkali Metals
What is Group 1: Alkali Metals?
The alkali metals are soft, reactive metals in Group 1 that react with water to form hydroxides and hydrogen.
What are the most important points about Group 1: Alkali Metals?
The main points are: Reactivity increases down the group; They have one outer electron; Stored under oil to prevent reaction.
Why is Group 1: Alkali Metals useful?
Understanding Group 1: Alkali Metals helps you explain why substances behave as they do, from cleaning products and food to medicines.
How can I practise Group 1: Alkali Metals?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to Group 1: Alkali Metals?
Related topics in Chemistry include Transition Metals, Covalent Bonding, Properties of Simple Molecules.