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Information valid for Sc-45 unless otherwise noted

Basic Information

Symbol: Sc
Atomic Number: 21
Mass: 44.95591
Melting Point: 1539.0 C
Boiling Point: 2832.0 C
Number of Protons/Electrons: 21
Number of Neutrons: 24
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 2.989 g/cm3
Color: silvery

Atomic Structure

[Bohr Model of Scandium]
Number of Energy Levels: 4

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 9
    Fourth Energy Level: 2


Isotope Half Life
Sc-44 3.92 hours
Sc-45 Stable
Sc-46 83.81 days
Sc-46m 18.72 seconds
Sc-47 3.34 days
Sc-48 43.67 hours
Sc-49 57.3 minutes


Date of Discovery: 1879
Discoverer: Lars Nilson
Name Origin: From Scandinavia
Uses: No uses known
Obtained From: minerals (thortveitile, wiikite)