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CS109909-3
LEAD
Max Wortman
Period 5
CS109909-3
LEAD – 6P14
Electrons: 82 Neutrons: 125
Protons: 82 Atomic Mass: 207.2
Melting point: 327.6º C
CS109909-3
Basic Information
 Lead is a basic group element with symbol “Pb”
and atomic number 82.
 Derives from Latin word plumbum
 Lead is a soft, malleable poor metal.
 It is also counted as a heavy metal.
 A soft blue-grey metal
 Lead, when exposed to air, turns to a dull, gray
color.
 Found in a natural environment.
 Labeled as a “post-transition metal”
 Still used in consumer products.
 Such as paint and gasoline
CS109909-3
History
 Lead has been commonly used for thousands
of years because it is widespread, easy to
extract and easy to work with.
 The Romans had the largest lead mining
economy in history.
 Lead’s symbol “Pb” is an abbreviation of its
Latin name “plumbum” for soft metals.
 Unfortunately, no one knows who discovered
lead.
 There is evidence that the first discovery of
lead was 9,000 years ago.
CS109909-3
How does lead get into the
environment?
 Deterioration of lead-based paint
 Leaded gasoline
 Lead mines or smelters 
CS109909-3
How are people exposed to
lead?
 Dust, paint, and/or soil
 Contaminated food, water, or alcohol
 Some imported home remedies and
cosmetics
CS109909-3
Lead in home environments:
bare soil
porch
windows
doors
walls
tracked in
Lead in dust
• Pre-1978 homes with deteriorated leaded paint
• Children at greatest risk
• Most exposure through leaded dust in home
CS109909-3
How are people exposed to lead in
work environments?
 Swallowing lead dust
 Breathing contaminated air
 Lead contacting skin
 Workers can expose
their families if they
bring lead home on
their clothes or skin
CS109909-3
What jobs involve lead?
 Lead smelting
or mining
 Construction/ remodeling
 Automobile repair
 Plumbing
 Police officers/military
 Many others
CS109909-3
Lead in drinking water
 Lead can enter water by leaching from
 Lead-containing pipes
 Brass faucets
 Solder
 Boiling does not get rid of lead
 Running cold water before
use may reduce exposure
CS109909-3
Lead in commercial products
 Lead is still used in products such as:
 Bridge paint
 Computers
 Solder
 Ceramic glazes
 Jewelry
 Automotive batteries
 Imported or older pre-
regulation products
CS109909-3
Lead in food products
 Food or beverages may be contaminated
through
 Production
 Packaging
 Storage
CS109909-3
Effects of lead
 No known threshold for effects of lead
 Affects all organ systems
 Developmental neurologic effects
 Affects fetal viability, and fetal and early
childhood development
 Maternal lead may affect child’s neurologic
development
CS109909-3
FIN
CS109909-3
FIN
Max Wortman
Period 5

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LEAD PRESENTATION

  • 2. CS109909-3 LEAD – 6P14 Electrons: 82 Neutrons: 125 Protons: 82 Atomic Mass: 207.2 Melting point: 327.6º C
  • 3. CS109909-3 Basic Information  Lead is a basic group element with symbol “Pb” and atomic number 82.  Derives from Latin word plumbum  Lead is a soft, malleable poor metal.  It is also counted as a heavy metal.  A soft blue-grey metal  Lead, when exposed to air, turns to a dull, gray color.  Found in a natural environment.  Labeled as a “post-transition metal”  Still used in consumer products.  Such as paint and gasoline
  • 4. CS109909-3 History  Lead has been commonly used for thousands of years because it is widespread, easy to extract and easy to work with.  The Romans had the largest lead mining economy in history.  Lead’s symbol “Pb” is an abbreviation of its Latin name “plumbum” for soft metals.  Unfortunately, no one knows who discovered lead.  There is evidence that the first discovery of lead was 9,000 years ago.
  • 5. CS109909-3 How does lead get into the environment?  Deterioration of lead-based paint  Leaded gasoline  Lead mines or smelters 
  • 6. CS109909-3 How are people exposed to lead?  Dust, paint, and/or soil  Contaminated food, water, or alcohol  Some imported home remedies and cosmetics
  • 7. CS109909-3 Lead in home environments: bare soil porch windows doors walls tracked in Lead in dust • Pre-1978 homes with deteriorated leaded paint • Children at greatest risk • Most exposure through leaded dust in home
  • 8. CS109909-3 How are people exposed to lead in work environments?  Swallowing lead dust  Breathing contaminated air  Lead contacting skin  Workers can expose their families if they bring lead home on their clothes or skin
  • 9. CS109909-3 What jobs involve lead?  Lead smelting or mining  Construction/ remodeling  Automobile repair  Plumbing  Police officers/military  Many others
  • 10. CS109909-3 Lead in drinking water  Lead can enter water by leaching from  Lead-containing pipes  Brass faucets  Solder  Boiling does not get rid of lead  Running cold water before use may reduce exposure
  • 11. CS109909-3 Lead in commercial products  Lead is still used in products such as:  Bridge paint  Computers  Solder  Ceramic glazes  Jewelry  Automotive batteries  Imported or older pre- regulation products
  • 12. CS109909-3 Lead in food products  Food or beverages may be contaminated through  Production  Packaging  Storage
  • 13. CS109909-3 Effects of lead  No known threshold for effects of lead  Affects all organ systems  Developmental neurologic effects  Affects fetal viability, and fetal and early childhood development  Maternal lead may affect child’s neurologic development