Topic 6- Group 1 Flashcards
Describe 2 features of alkali metals
Alkali metals are soft and have relatively low melting and boiling points Malleable, low density and shiny when you remove the oxide layer
Why can some elements be classified as alkali metals based on their position on their position in the periodic table
Elements in the same group in the periodic table have similar chemical properties. This is because their atoms have the same number of electrons in the highest occupied energy level. Group 1 elements are reactive metals called the alkali metals.
Describe a pattern in group 1
They become more reactive as you go down the list
From top to bottom recite group 1’s elements
Lithium Sodium Potassium Rubidium Cesium Francium
Explain the pattern of reactivity in terms of electronic configuration
The more shells that an atoms electronic configuration contains, the more reactive it is because the force of attraction is less therefore it will lose electrons more easily
What are the products of the reaction of lithium and water
lithium hydroxide and hydrogen
What are the products of the reaction of sodium and water
Sodium hydroxide and hydrogen
What are the products of the reaction of potassium and water
potassium hydroxide and hydrogen
Describe the reactions of water with lithium, sodium and potassium
Lithium is the least reactive and potassium is the most.
Lithium- floats and fizzes steadily and becomes smaller till it eventually disappears.
Sodium- Coluorless solution formed, the sodium melts to form a ball that moves around on the surface, it fizzes rapidly and hydrogen produces may burn with an orange flame before sodium disappears.
Potassium- The metal melts and floats, it moves around very quickly on surface and the hydrogen ignites instantly, the metal also sets on fire with sparks and a lilac flame, sometimes a small explosion at end,
what is an alkali
a insoluble base
