Lead

Lead
Lead
Symbol Pb
Atomic Number 82
Atomic Mass 207.2
Discovered by In the Middle East (7000 BCE)

Chemical Properties of Lead

Group 14 Melting point 327.462°C, 621.432°F, 600.612 K
Period 6 Boiling point 1749°C, 3180°F, 2022 K
Block p Density (g cm−3) 11.3
Atomic number 82 Relative atomic mass 207.2
State at 20°C Solid Key isotopes 208Pb
Electron configuration [Xe] 4f15d16s6p2 CAS number 7439-92-1
ChemSpider ID 4509317 ChemSpider is a free chemical structure database

What is Lead?

  • Lead is an element of the periodic table with an atomic number of 82.
  • Lead (Pb) is metal which has been used by humans for centuries dating back to 7000 BC.
  • The element is present in various minerals in minute quantities excluding sulfide and lead glance(PBS) which is used to produce the metal around the world.

Uses of Lead

  • It is a metal that has been used since Roman times for making paints and pipes as a corrosion resistant.
  • Used in car batteries and a major ingredient of lead acid batteries.
  • For soldering parts of electrical equipment.
  • As electrodes in electrolysis processes.

Properties of Lead

  • Lead (Pb) is a white lustrous metal with a soft texture and is highly malleable.
  • The metal is highly corrosion resistant, in addition to not being a poor conductor of electricity.
  •  The metal in its powdered form produces a bluish-white flame when burnt in air.
  •  Once mixed with fluorine in room temperature forms lead fluoride.

Important Facts About Lead

  • The metal element is hazardous for humans and would target the vital internal organs leading to several cases of lead poisoning.
  • The metal is said to hamper the growth of organs and the brain of young children.
  • Lead is one among a handful of elements which were known to the society from ancient times; thus, it was never formally discovered. In fact, alchemists considered lead as one of the oldest metals.

Practise This Question

34 gm of H2O is decomposed to _______ gm of hydrogen and ____ gm of oxygen.