Alkali Metals Flashcards
which group are the alkali metals in?
1
what happens when alkaline metals react with water?
they form an alkaline solution
name the alkali metals
lithium, sodium, potassium, rubidium, caesium, francium
as you go down the group, the reactivity…
increases
as you go down the group, the softness…
increases
as you go down the group, the density…
increases
as you go down the group, the melting and boiling point…
decreases
why does the reactivity increase as you go down the group?
more electron shells = outer shell electrons are further away from the nucleus and get lost easily during reactions
what occurs when Lithium reacts with water?
floats, fizzes steadily, slowly disappears
what occurs when Sodium reacts with water?
floats, fizzes rapidly then disappears
what occurs when Potassium reacts with water?
moves rapidly on surface, burns with lilac flame, sparks (?)
what is the SYMBOL equation for Lithium and water?
2Li + 2H20 –> 2NaOH + H2
what is the SYMBOL equation for Sodium and water?
2Na + 2H20 –> 2NaOH + H2
what is the SYMBOL equation for Potassium and water?
2K + 2H20 –> 2KOH + H2
what is the WORD equation for Lithium and water?
lithium + water –> lithium hydroxide + hydrogen
