Periodex

General properties

Group

group 3

Period

period 7

Category

transition metals

Standard atomic weight

-

Melting point

1900 K (predicted)

Boiling point

unknown

Phase at STP

solid (predicted)

Additional properties

Block

d-block

Electron configuration

[Rn] 5f¹⁴ 7s² 7p¹

Electrons per shell

2, 8, 18, 32, 32, 8, 3

Electronegativity

–

Density

~15.6–16.6 g/cm³ (predicted)

Oxidation states

+3

CAS Number

22537-19-5

Natural isotopes

Discovery history

Discovered by

Lawrence Berkeley National Laboratory and Joint Institute for Nuclear Research

Year of discovery

1961–1971

Origin of name

Ernest O. Lawrence, physicist