Group 7
Another name fro group VII
Halogens
Trend in density of grouo VII
increase
Different name of group I
Alkali metals
Different name of group 0
Noble gases
What a chemical formula of table salt
NaCl
What diatomic means?
Cl-Cl, Br-Br Molecules consist of 2 atoms
Trend in colour in group VII
Getting darker
Trend in reactivity, explain!
Increases, shielding effect
How reactive are they? Why?
Full outer shell. Unreactive.
PH of pure water
7
Colour and state of chlorine
Pale green gas
Reactivity increases or decreases down the group? Why?
Decreases, electron shielding
Trend in density
Increases
What innert means?
Unreactive.
Chemical formula of methane
CH4
Colour nd state of bromine
Red, brown liquid
Which halogens can chlorine displace from aqueous solution?
Iodine and bromine
Trend in melting temp
Decreases
Electron configuration of Ne
2,8
Chemical formula of sulphuric acid
H2SO4
Colour and sate of iodine
Gray black solid
Write the equation between chlorine and bromine iodide
Cl2 + 2KBr = 2KCl + Br2
Write a chemical equation between K and water
2K + 2H2O = 2KOH + H2
Uses of noble gases (min 2)
Lasers, light, welding, medical, ..
What is Avogadro number?
6,022 * 10 to power 23