57
La
Lanthanum
138.91 u
Lanthanum
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Period
6
Group
—
Block
f-block
Phase (STP)
Solid
Lanthanum is the first element in the lanthanide series. It is used in camera lenses, catalysts, and battery electrodes.
Compounds Containing Lanthanum
More Lanthanide
Frequently Asked Questions
What is Lanthanum?
Lanthanum (La) is a chemical element with atomic number 57. It is a solid at standard temperature and pressure, classified as a lanthanide.
What are the key properties of Lanthanum?
Lanthanum has an atomic mass of 138.91 u.
What is the electron configuration of Lanthanum?
The electron configuration of Lanthanum is [Xe] 5d1 6s2. It is in the f-block of the periodic table.
What is the electronegativity of Lanthanum?
Lanthanum has an electronegativity of 1.1 on the Pauling scale.