Group 9 element

The Group 9 elements are:

• Cobalt (27)
• Rhodium (45)
• Iridium (77)
• Meitnerium (109)

Key to color coding in table slice on right:

Transition metals

Color coding for these atomic numbers: At room temperature, all are solid; red indicates item is synthetic and does not occur naturally.

See also

• Periodic Table of the Elements