Page 45 - Curriculum Visions Dynamic Book

Bromine
48th most common element on Earth
Mainly used for photography as silver bromide
Brown liquid, chemical symbol Br
Fluorine
The most reactive of all elements
Used with carbon- based compounds to make nonstick plastic
Extensively used to prevent tooth decay
Pale yellow gas, chemical symbol F
Atomic number 35, atomic weight about 80
Atomic number 9, atomic weight about 19
45
Powerful unpleasant smell
Makes up 0.0065% of sea water
Bromine compounds were once given as sedatives
Used in flame retardants
SHELL DIAGRAMS
The shell diagrams on these pages are representations of an atom of each element. The total number
of electrons are shown in the relevant orbitals, or shells, around the central nucleus.
Electron shell
Electron
Nucleus containing protons and neutrons (called nucleons)
Extremely poisonous in elemental form
Highly corrosive as a gas and as hydrofluoric acid
Exists freely only as a gas