group 1 elements Flashcards
list 2 properties of alkali metals
-soft (easily cut with a knife)
-low density
-low melting and boiling points compared to other metals
trend within first three in group
less dense than water
what happens to the reactivity as you go down the group?
it increases
what happens to the melting and boiling points as you go down the group?
they decrease
what happens to the atomic mass as you go down the group?
it increases
why does reactivity increase down the group?
the electron is further away from the nucleus as you go down the group as the atom gets bigger due to more shells, therefore the attraction between the nucleus and valence electron is weaker, so the valence electron is more easily lost
what charge do group 1 ions have?
1+
what compounds do group 1 metals react to form?
ionic
reaction with water
metal (s) + water (l) -> metal hydroxide (aq) + hydrogen (g)
how do they react with water
vigorously, from hydrogen and hydroxides, fizzing, moves on surface
what happens to the reaction with water as you go down the group?
more energy is given out by the reaction, it is more violent
reaction with chlorine
metal + chlorine -> metal chloride
how do they react with chlorine?
vigorously
what do group 1 metals form when reacted with chlorine?
white metal chloride salts
what happens to the reaction with chlorine as you go down the group?
it gets more vigorous
