Halogens
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PRESENTATION OUTLINE
WHAT?
Photo by Travis Isaacs
The halogens are the elements in group 7 of the periodic table, in their natural form they are toxic .
Photo by Thomas Hawk
HALOGENS
- All halogens have seven electrons in their outer shell
- Can accept one electron, making it an ion with a minus 1 charge
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Florine is used in everyday lives as toothpastes and nail polish
Photo by Jose Luis Mieza Photography
CHLORINE is used to clear out the germs in swimming pools, but when inhaled, CHLORINE is incredibly dangerous
IODINE is a disinfectant for wounds, often used in hospitals
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Astatine is used in cancer treatments and sometimes used as a radioactive tracer
Photo by Paul Bratcher Photography
REACTIONS
- Moving down the group, the reactivity of the halogens decreases
- The more reactive halogen will always take over the less reactive halogen in a compound
Photo by Jordi Payà Canals
EXAMPLE
Photo by Ben Fredericson (xjrlokix)
ADDING CHLORINE WATER TO POTASSIUM BROMIDE
CHLORINE WILL TAKE OVER, BECOMING POTASSIUM CHLORIDE, LIBERATING BROMINE
Photo by Møuin.M►
ADDING BROMINE WATER TO POTASSIUM CHLORIDE
NO DISPLACEMENTS WILL OCCUR SINCE BROMINE IS LESS REACTIVE THAN CHLORINE
Photo by Møuin.M►
ADDING IODINE TO POTASSIUM CHLORIDE, BROMIDE, IODIDE
WILL DO NOTHING BECAUSE IODINE IS LESS REACTIVE THAN ANY IF THE PROPERTIES
Photo by Møuin.M►
