Basic Information

Name: Scandium
Symbol: Sc
Atomic Number: 21
Atomic Mass: 44.95591 amu
Melting Point: 1539.0 °C (1812.15 K, 2802.2 °F)
Boiling Point: 2832.0 °C (3105.15 K, 5129.6 °F)
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
  
Number of Energy Levels: 4

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

Isotopes
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

Facts

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