Related Clues:

• Iron or tin
• Zinc or zirconium
• Nitrogen or oxygen
• Almost any element whose name ends in -ium
• Good conductor?
• Earth, wind or fire, to an early scientist
• Detector activator
• Natural environment
• Periodic-table component
• Like most golf woods, nowadays
• Silver or sulfur
• Gold or silver, but not bronze
• Helium or hydrogen
• Heavy rock?
• Gold, e.g.