| what are noble gases | are unreactive, monoatomic gases because of their full outer shells. |
| what are noble gases | are unreactive, monoatomic gases because of their full outer shells. |
| what do all noble gases do | They are all used to provide inert atmospheres as they are inert (non reactive) |
| what happens as we go down in group 1 | the reactivity increases |
| what happens as we go down in group 7 | the reactivity decreases |
| what are alkali metals | lithium, sodium and potassium (Group I) are a collection of relatively soft metals with an increasing trend in melting point, density and reactivity with water. |
| what are halogens | group 7 , collection of diatomic nonmetals showing a trend in colour (gets darker going down the group). |
| what are halogens | They are poisonous and increase in melting point going down the group. Halogens will also displace less reactive halides in reactions such as chlorine + potassium bromide -> potassium chloride + bromine. |
| what are halogens | They also change state going down the group with fluorine and chlorine being gases at room temperature, bromine being liquid (one of only two) and iodine being solid. |
| what are transition metals | a collection of metals having high densities, high melting points and forming coloured compounds, and which, as elements and compounds, often act as catalysts |
| what are noble gases | are unreactive, monoatomic gases because of their full outer shells. |
| what is helium used for | Helium is used to fill balloons as it is less dense than air and doesn’t burn |
| what is neon, argon and xenon used for | used in advertising lights |
| what else is argon used for | electric light bulbs |
| what do all noble gases do | They are all used to provide inert atmospheres as they are inert (non reactive) |
