Group 1 Flashcards
What are the Group 1 metals called
Alkali metals
What are the properties of Group 1 metals
they are soft and easily cut with a knife
shiny grey with low density
react vigorously with water and oxygen
What do group 1 metals react with water to form
Metal hydroxides + hydrogen
what does sodium do in water
floats
fizzes
dissolves
what does lithium do in water
floats
fizzes
dissolves
what does potassium do in water
floats
fizzes
gives off lilac flame
dissolves
What does OH- ions indicate
they are alkaline 12-14
What is the trend in reactivity in Group 1
the further down the group the more reactive
Why are elements further down group 1 more reactive
outer electron is less attracted to the nucleus
there is a greater distance between the positive nucleus and negative outer electron
the outer electron is shielded from the nucleus by internal shells
