Periodic table

Physical properties of bromine

Dense reddish liquid, poor conductor , low boiling point, low melting point

Physical properties of iodine

Shiny grey crystals , violet vapour, poor conductor , high boiling point, high melting point

Caesium and water reaction

Sinks to bottom, highly exothermic , hydrogen produced , explosive

Potassium and water reaction

Ignites spontaneously, lilac flame , moves , vigorous effervescence, floats

Sodium and water reaction

Moves fast , vigorous effervescence, floats , forms sphere

Why is group 0 unreactive?

They have a full outer shell

Use of bromine

Kills bacteria in rivers

use of chlorine

disinfectant in swimming pools

Use of iodine

disinfectant on wounds prior to surgery

3 properties of metals

high density, malleable, good conductors of heat and electricity

3 Non-metal properties

Malleable , low density, insulator

Lithium and water reaction

Floats, moves , effervescence

Chemical properties of chlorine

Explosive in sunlight, slow in dark

Chemical properties of fluorine

Explosive in dark , even in cold

Chemical properties of iodine

300 degrees and platinum catalyst, very slow

Chemical properties of sodium

Melts easily , yellow flame

Chemical properties of potassium

Melts easily, lilac flame

Chemical properties of lithium

Melts easily, crimson burn

Chemical properties of bromine

300 degrees and platinum catalyst

Physical properties of caesium

Silvery white , very soft , tarnishes , conductor , low melting point , high boiling point

Physical properties of rubidium

Silvery white, conductor , tarnishes, low melting point , high boiling point

Physical properties of lithium

Shiny grey, tarnishes, conductor , high boiling point , high melting point

Physical properties of potassium

Tarnishes , conductor , soft , silvery white , low melting point , high boiling point

Physical properties of sodium

Conductor , tarnishes , soft , high boiling point, low melting point

Physical properties of chlorine

dense and yellow-green gas, poor conductor, low melting point , low boiling point