The group 1 elements Flashcards
what are group 1 elements called?
alkali metals
why are group 1 metals called alkali metals?
because their reaction with water gives alkaline solutions
where are alkali metals stored?
under oil because they react with air and water
what do alkali metals react with water to form?
the metal hydroxide and hydrogen
which is more reactive lithium or sodium?
sodium
which is more reaction sodium or potassium?
potassium
when lithium, sodium and potassium react with water they float on the surface, why does this happen?
because their density is less than the density of water
why do alkali metals have similar properties?
because when they react their atoms need to lose one electron to form full outer shells
what is an atom called once it loses an electron?
an ion
why is sodium more reactive than lithium?
lithium loses its outer electron from its second shell. Sodium loses its outer electron form its third shell. The third shell is further away from the attractive pulling force of the nucleus. This means that the electron from sodium is more easily lost than the electron from lithium
what is the balanced symbol equation for lithium and water?
2Li + 2H20 — 2LiOH + H2
why do atoms of group 1 have similar properties?
because they all need to loose one electron
what makes an alkali metal more reactive?
if its easy to lose that spare electron
what is OILRIG?
oxidation is loss
reduction is gain
what is a flame test used to test?
if lithium, sodium or potassium is present in a compound
