103Lr
Element 103
Lawrencium
Actinides
Lawrencium is a synthetic chemical element with chemical symbol Lr (formerly Lw) and atomic number 103.
Key data
- Atomic number
- 103
- Atomic mass
- 266.000 u
- Group / Period
- 3 / 7
- Block
- d-block
- Phase at STP
- Solid
- Density
- —
- Melting point
- 1626.8 °C
- Boiling point
- —
- Electron configuration
- [Rn] 5f14 7s2 7p1
Common uses
- •Research only
- •Last actinide
- •Synthesized in 1961
Discovery
Year: 1961
Discovered by: Lawrence Berkeley National Laboratory
Frequently asked questions
What is the atomic number of Lawrencium?
Lawrencium has atomic number 103. Its symbol is Lr and its atomic mass is 266 u.
What category of element is Lawrencium?
Lawrencium is classified as actinides. It sits in group 3, period 7 of the periodic table.
What is Lawrencium used for?
Common uses of Lawrencium include: Research only, Last actinide, Synthesized in 1961.
When was Lawrencium discovered?
Lawrencium was discovered in 1961 by Lawrence Berkeley National Laboratory.
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