The Physical Properties of Alkili Metals
Specification Point 6.2:
Recall that alkali metals:
a) are soft
b) have relatively low melting points
- The Group 1 metals are also called the alkali metals as they form alkaline solutions with high pH values when reacted with water.
- The Group 1 metals are lithium, sodium, potassium, rubidium, caesium and francium.
The alkali metals lie on the far left-hand side of the Periodic table
- The Group I metals:
- Are soft and easy to cut, getting softer as you move down the Group due to increasing density (except for potassium which fluctuates).
- The first three alkali metals are less dense than water.
- They all have relatively low melting points which decreases as you move down the Group due to decreasing electrostatic forces.
The melting point of the Group 1 metal decreases moving down the group
Edexcel GCSE Chemistry Notes
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Morgan’s passion for the Periodic Table begun on his 10th birthday when he received his first Chemistry set. After studying the subject at university he went on to become a fully fledged Chemistry teacher, and now works in an international school in Madrid! In his spare time he helps create our fantastic resources to help you ace your exams.
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