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Lead

82
207.2
Pb
Lead

Element Stats

Select a temperature unit to update boiling and melting point values.

Physical

Physical Properties
PropertyValuePropertyValue
Appearancemetallic gray
ClassificationPost-Transition MetalsDensity11.34 g/cm³ at STP
Boiling Point2022 KMelting Point600.61 K

Atomic

Atomic Properties
PropertyValuePropertyValue
Atomic Number82Atomic Mass207.21
Van Der Waals Radius202Atomic Radius (empirical)175

Electronic & Chemical

Electronic and Chemical Properties
PropertyValuePropertyValue
Electronegativity1.87Electron Affinity34.4204 kJ/mol
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p2
Oxidation States4, 3, 2, 1, -1, -2, -4
Ionization Energies

Showing all 5 ionization energies.

  1. 715.6 kJ/mol
  2. 1450.5 kJ/mol
  3. 3081.5 kJ/mol
  4. 4083 kJ/mol
  5. 6640 kJ/mol

History

Lead has been used by humans for thousands of years, dating all the way back to 7000 BC! Some of the earliest lead artifacts, like beads, have been found in Asia Minor, where ancient people discovered how to melt lead from rocks. Although lead wasn’t very useful on its own because it’s soft, it was often found alongside silver. This made it valuable to early civilizations, who used lead for things like fishing sinkers, cosmetics, and even writing materials. The ancient Egyptians were some of the first to explore lead’s many uses, and soon, lead became popular across the ancient world.

By the time of the Roman Empire, lead production was booming. Romans mined huge amounts of lead. They used it for water pipes, which is actually where the word "plumbing" comes from—plumbum is the Latin word for lead! Romans also used lead to make coins, sling bullets, and even wine sweeteners (clearly not a healthy decision). In fact, lead was so important to Roman society that some historians call this period the Lead Age. While lead poisoning was a problem, especially for the wealthy who used lead vessels, the metal remained essential for everyday life.

During the Middle Ages and Renaissance, lead continued to be widely used. It was a key material for creating stained glass windows, and alchemists believed that lead could be transformed into gold. Lead even found its way into cosmetics, with Queen Elizabeth I of England famously using lead-based makeup to achieve a pale complexion. Unfortunately, the lead in these cosmetics caused serious health issues, and many believe it contributed to Elizabeth’s death.

The Industrial Revolution in the 18th and 19th centuries saw an explosion in lead production. Lead became crucial for plumbing, paint, and printing presses. This increased exposure to lead also led to more cases of lead poisoning. Scientists began to understand the dangers of lead fumes and dust, and in the late 1800s, the first laws were passed to protect workers from lead poisoning.

In the 20th century, lead was still widely used, especially in lead-based paints and as an additive in gasoline. However, as we learned more about the harmful effects of lead, countries began to phase it out. In the 1970s, the United States and Europe started passing laws to reduce lead exposure, and leaded gasoline was eventually banned. Today, lead is mainly used in batteries, but its long history reminds us of how much this metal has shaped human civilization.

Properties

Lead is a bluish-white metal of bright luster. It is very soft, highly malleable (easy to shape), ductile (able to be made into a wire), and a poor conductor of electricity. It is very resistant to corrosion.

Uses

For years, lead was widely used in a variety of products, including cosmetics, glazes for pottery, paint, pipes, and in gasoline. All these uses have now been banned, replaced, or discouraged as lead is known to be detrimental to health, particularly for children. However, many pipes in our homes today are still made of lead.

Lead is very effective as a sound absorber, is used as a radiation shield around x-ray equipment and nuclear reactors and is used to absorb vibration. Lead is still widely used for car batteries, pigments, ammunition, cable sheathing, weights for lifting, weight belts for diving, lead crystal glass, radiation protection, and in some solders (melted metal used to fuse objects together). It is used to line containers for corrosive liquids (such as sulfuric acid). It is also sometimes used in architecture, for roofing, and in stained glass windows.

Compounds

Lead is present in a variety of compounds such as lead acetate, lead chloride, lead chromate, lead nitrate, and lead oxide.

Forms

Natural lead is a mixture of four stable isotopes: lead-204 (1.48%), lead-206 (23.6%), lead-207 (22.6%), and lead-208 (52.3%). Lead isotopes are the end products of each of the three series of naturally occurring radioactive elements: lead-206 for the uranium series, lead-207 for the actinium series, and lead-208 for the thorium series. Twenty-seven other isotopes of lead, all of which are radioactive, are recognized.

Sources

Lead is obtained mainly from galena (PbS) ore by a roasting process. Anglesite, cerussite, and minim are other common lead minerals.

Fun Facts

What's in a name?

Pencils do not—and never did—contain lead. The "lead" in pencils is actually graphite. When large deposits of graphite were first discovered in England in the 1500s, people assumed they had discovered lead and the name stuck.

An element by any other name would taste as sweet

In the past, lead compounds were sometimes used as sweeteners. Although the use of lead sweeteners was already illegal at the time, it’s suspected that the famous composer Beethoven may have died from lead poisoning from a sweetener used in wine.

Maybe she's born with it, maybe it's lead

In 16th and 17th century Europe, lead was used in cosmetics to obtain the fresh "white-faced" look that was so popular at the time, particularly among the aristocracy. Queen Elizabeth I of England famously wore lead paint, giving her the coveted "Mask of Youth." When she died, she had a full inch of makeup on her face!

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