group 1 elements. Flashcards
what are group 1 metals known as?
alkali metals.
how many electrons do they have in their outer shell?
1.
what are the properties of group 1 elements?
low melting and boiling points that decrease down the group .
become more reactive down the group.
why does the trends: low melting and boiling points that decrease down the group .
become more reactive down the group.
:happen.
outer electron gets further away from the influence of the nucleus so it can be lost more easily.
how are alkali metals stored and why?
under oil.
react very vigorously with oxygen and water, including moisture in the air.
what happens when an alkali metal reacts with water?
forms a hydroxide and hydrogen gas is given off.
what is the density of group 1 metals?
low density.
lithium, sodium, potassium are less dense than water so float on top of it.
what happens when a metal hydroxide is dissolved in water?
alkaline solution produced.
what do alkali metals react with and and what compound does it form?
non-metals.
ionic compounds.
when an alkali reacts it losses an electron and forms what charge?
(+1)
