Zirconium

Hafnium, HAF nee uhm, a chemical element, is a silver-colored metal. It absorbs neutrons better than most metals and is resistant to corrosion. For… See more » Niobium, ny OH bee uhm, also called columbium, is a soft, silver-white or gray metallic element. In nature, it occurs chiefly combined with… See more » Vanadium, a silvery-white metallic element, occurs throughout Earth's crust in extremely small quantities. Traces of vanadium also have been found… See more »