HALOGENS

FLUORINE(F)

• Atomic number- 9
• Atomic weight- 19.00
• General physical properties:
• Does not conduct anything
• At room temp- yellow gas-fluorine
• NonMetals
• Used in toothpaste and drinking water

FLUORINE

• General chemicals:
• Fluorine reacts violently with water forming hydrogen fluoride, and liberates oxygen which is highly charged with ozone.
• The flammability of fluorine is highly toxic and corrosive
• The origin: from the Latin word fluo (flow)
• The uses: refrigerants

CHLORINE (CL)

• Atomic #: 17
• Atomic weight: 35.45
• General physical properties:
• NonMetal
• Electrical
• Room temp - gas

CHLORINE

• General chemical properties:
• It is decomposed and a solution of Hydrochloric Acid remains
• Is not flammable but can react explosively
• Chlorine is used in pools

BROMINE(BR)

• Atomic #35
• Atomic mass 79.90
• General physical properties:
• Nonmetal
• Does not conduct heat or electricity
• At room temp- red liquid
• Used in pools and hot tubs and to control algae and bacteria growth

BROMINE

• General chemical properties:
• Bromine are moderately soluble in water.
• None flammable
• The origin: from the Greek word brômos (stench)
• The uses: poisonous

IODINE(I)

• Atomic #: 35
• Atomic mass: 126.90
• General physical properties:
• Conducts electricity in a liquid or molten state, but Not in a solid state
• Room temp- soild
• Nonmetal
• Kills fungus, bacteria, and other micro organisms

IODINE

• General chemical properties:
• Does Not react with water and is only slightly soluble
• Is Not flammable it is a strong oxidizing agent
• Name origin: from the Greek word iôdes (violet)
• The uses: required in humans

ASTATINE(AT)

• Atomic #: 85
• Atomic weight: 210
• General physical properties:
• NonMetal
• The conductive ability is a radioactive Chemical element
• Room temp- solid
• Used in cancer treatment

ASTATINE(AT)

• General chemical properties:
• Astatine can also react with hydrogen to form hydrogen astatine, which when dissolved in water
• Name origin: From the Greek word astatos (unstable)
• The uses: No uses known

Untitled Slide

QUESTIONS

• Who many elements are in the group halogens ?
• What is the atomic # for fluorine?
• Is the element bromine flammable?
• What is iodine in room temperature?
• What is astatine atomic weight?