Group 1 elements
- Created by: Niamh Bush
- Created on: 27-04-13 12:07
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- Group 1 - Alkali Metals
- As you go DOWN Group 1:
- The elements become more reactive because the outer electron is more easily lost, because it's further from the nucleus.
- The elements have lower melting and boiling points.
- The Alkali metals have low density.
- Lithium, Sodium and Potassium are less dense than water.
- Lithium, Sodium, Potassium, Rubidium, Caesium and Francium.
- All elements in Group 1 have only 1 outer electron.
- They form ionic compounds with non-metals:
- Keen to lose their one outer electron to form a 1+ ion
- Will not form a covalent bond!
- They always form ionic bonds and produce white compounds that dissolve in water to form colourless solutions.
- Reactions with water produce hydrogen gas
- When Lithium, Sodium and Potassium are put in water , they react very vigorously
- They float and move around the surface, fizzing furiously.
- Potassium gets hot enough to ignite it A lit splint will indicate hydrogen by producing a squeak sound as the H2 ignites
- They form hydroxides that dissolves in water to give alkaline solutions. They turn the colour of the universal indicator to purple.
- When Lithium, Sodium and Potassium are put in water , they react very vigorously
- As you go DOWN Group 1:
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