Alkali metals are the elements in Group 1 of the periodic table which react with water to form strongly alkaline hydroxides.

Density is a measurement of mass per unit volume; how tightly packed a substance's particles are in a particular space.

Alkali metal hydroxides are soluble compounds formed when the alkali metals react with water. They form colourless solutions.

Properties of Group 1

Chemistry

In the Chemical Analysis unit, pupils will build on their knowledge of the periodic table to explore various techniques for analysing substances and interpreting data.

In the Patterns in the Periodic Table unit, pupils learned about the arrangement of elements in the periodic table and the trends in properties of elements.

This unit explores how elements' reactions are related to electron arrangement and atomic number. It covers the properties of Groups 1, 7, and 0 and explains how these depend on outer electrons. It also predicts element reactivity and reactions based on their positions in the periodic table.

Groups of the periodic table

What is the name given to Group 1 of the periodic table?

What is the correct electron configuration of sodium?

Reactivity {{}} down the group for Group 1 elements.

Place the following Group 1 metals in order of density. Starting with the least dense element first.

Outer electron in francium is attracted with less force to its atomic nucleus.

Outer electron in caesium is attracted with more force to its atomic nucleus.

Outer proton in francium is attracted with more force to its atomic nucleus.

Outer proton in caesium is attracted with less force to its atomic nucleus.

Explain why you would expect francium to be more reactive than caesium.

What are the products of the reaction between lithium and water?

Match the following symbols to their elements.

Elements are said to be in the same {{}} if they are in the same column of the periodic table.

Place these elements in order of decreasing relative atomic mass.

Features that can be observed without changing the substance itself.

Features of the way a substance reacts with other substances.

Elements in a group have similar physical properties. What is meant by a physical property?

What type of category best describes Group 1 elements?

Which Group 1 element has 55 protons, 55 electrons and 78 neutrons?

This lesson will be removed by end of Summer Term 2025.

Properties of Group 1

Lesson outcome

This lesson will be removed by end of Summer Term 2025.