Group 1: The Alkali Metals (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Practise the cards
14 cards from this deck
Why do alkali metals look dull on the outside?
Why do alkali metals look dull on the outside?
Oxide layer forms on surface
Why are alkali metals stored in oil?
Why are alkali metals stored in oil?
Prevents reaction with oxygen and moisture
How soft are alkali metals?
How soft are alkali metals?
Soft enough to cut with a knife
Why do most alkali metals float?
Why do most alkali metals float?
Low density
Outer shell electrons in Group 1
Outer shell electrons in Group 1
1 electron
Why are Group 1 metals very reactive?
Why are Group 1 metals very reactive?
Easily lose their 1 outer electron
Reactivity trend down Group 1
Reactivity trend down Group 1
Increases
Why does reactivity increase down Group 1?
Why does reactivity increase down Group 1?
Outer electron further from nucleus, easier to lose
Density trend down Group 1
Density trend down Group 1
Increases
Melting point trend down Group 1
Melting point trend down Group 1
Decreases
Products: alkali metal + water
Products: alkali metal + water
Metal hydroxide + hydrogen gas
Sodium with water behaviour
Sodium with water behaviour
Moves quicker, forms ball shape
Potassium with water observation
Potassium with water observation
Moves quickly with lilac flame
Universal indicator colour with alkali
Universal indicator colour with alkali
Purple